Being a rapist or even being labeled a sexual predator is damning enough in society for it not to be a rape culture.
This is interesting, because in my experience people being very afraid of the word "rape" often allows perpetrators to get away with their actions. Because people are so afraid of calling someone a rapist as they don't want to ruin their life if they're wrong. This is why even in court cases where there is plenty of evidence, it is very hard to get a conviction. Even then the woman often faces a lot of social issues from it herself. People seem to be more likely to scream at a woman who's accused someone of rape than the person accused. I guess people would rather believe someone's a lair than a rapist. People don't want to be wrong about it, and it is why many rapists (and pedophiles) spend years and years getting away with it. I've known rapists and pedophiles who've later been arrested, and the thing is, people knew that something was going on long before that but no one wanted to get involved. It's a very awkward topic for most, so yes while you can get these sorts of witch hunts, often rapists and pedophiles go completely unnoticed. There is also the assumption that everyone will automatically know if someone gets convicted which often isn't the case.
That said I think there's been a broadening of what's considered "rape" that's in some cases unhealthy and burdening the system making things harder for clear victims.
Rape is having sex with them against their will. Consent is the difference between rape and sex. If someone consents to have sex with you then you are not raping them (unless they are underage or severely inebriated), it is kinda no brainer. Rape does not have to involve physical violence. Stranger rape is what people most commonly think about which is when a man either lurks in wait or takes an opportunity to violently rape a complete stranger. This usually has little to do with the age of the victim and is more an act of pure violence than sex. This is really rare, most cases of rape are conducted by a family member, a partner, a friend or an acquaintance. In most of these cases it goes unreported, which is why education about rape is an important topic. For both men and women. There hasn't been a broadening of what's considered rape, it's just that people used to only see newspaper articles which pick more serious cases, while now lots of women are speaking up about their own experiences which don't match the image in popular culture.
I guess a good analogy is being mugged. If someone threatening demands you to give them your phone, wallet etc you might give those items over without them ever being violent towards you. That doesn't mean those items were a gift, you were still mugged and your items were still stolen. This is what it can be like if a man rapes a woman, often the woman is so shocked that he's ignoring her initial "no" that she freezes up. Sometimes she might fight the perpetrator off for a while and then give up and "go along with it". Shock does weird things to the brain. I have been overpowered before and have realised I'm being raped, but in that moment haven't known what to do so have tried to go along with it. I guess kind of like if someone makes a really distasteful joke you might laugh anyway to avoid awkwardness. You don't want to admit to what's happening so you try and make the best of the situation and make it be over faster. I've had it when I carried on acting fine with the person and it was only a few days later in hospital getting treated for the damage caused that I broke down. In that situation I had been dating him, we hadn't slept together yet but were on the verge of doing so but didn't have a condom which I was clear was essential. He clearly didn't care and overpowered me anyway. I did manage to fight him off eventually, but I was so in shock about what had happened I ignored it for the 48 hours afterwards. In these situations you do not necessarily act how you'd think you would act. I think it's also important to point out that you can rape someone even if they are attracted to you. That guy was gorgeous and I was completely up for sleeping with him. But I did not want what he did to me. For those who've suffered from abuse or rape in the past they might just assume it's something they have to tolerate and won't necessarily scream and fight.
There's a good video with an analogy to tea showing that you shouldn't force feed someone tea, even if they'd previously said they wanted tea. It makes it pretty obvious what consent really means. That if someone says no, then you need to just accept that and not try to force them to "want tea".
Rape culture is just about normalising sexual violence against women (and men). Could be in jokes, locker room talk, banter, even music. Could be talking about blurred lines or situations where a woman says no repeatedly to a man but then ends up falling for him anyway. Something I've noticed is a lot more American comedy has rape culture than English comedy. There's a cool interview with Stephen Fry talking about the differences between the two types of comedy. But I guess you've got American Pie, filming a girl against her will, talking about girls as primarily sex objects, making guys seem like they're always gagging for it, Stifler saying all sorts of derogatory and rude stuff to girls yet still having the girls all over him (though he does get screwed over a lot and he is painted as a dick it's also seen as being not that bad). Donald Trump is a prime example of making light of sexual harassment against women and objectifying women.
In England we have a lad culture which is dying out, which is basically just rape culture 101. I think I posted this study up here years ago, but basically some researchers took quotes from various different british lads mags and quotes from convicted rapists and gave them to people to see if they could tell which was which. They could not. The quotes were dark, really dark. Out of men I knew as a teenager who were the most "rapey", they tended to be the guys who read those sorts of magazines and idolised the lad culture. Now it's kinda chicken or the egg, are less respectful guys more into that sort of thing or do they become less respectful after reading it? The only thing I can say is that lads mags didn't have the age restrictions porn did, you could see soft pornographic images with it being hidden as a magazine about sports, cars and "guy stuff". This meant a lot of boys at the brink of puberty would read them.
However you feel about rape culture, you surely can't deny that there's something wrong about having children and teenagers read things idolising stuff that people can't tell the difference if it comes from a convicted rapist.
Some people see porn as part of rape culture, and while I can see their points, porn is never painted as real. It is very much a sexual fantasy that looks hot and you jerk off to. But most people are very aware it's completely fake, while magazines encourage you to buy into a way of life.
Rape culture isn't just against women, but also against men. I notice more women trying to get control back act derogatory towards men or grope them inappropriately. Women on hen do's sometimes treat all men like they're strippers in the same way I have experienced men doing. This IMO is not ok and is just as bad and doesn't empower women any more than it empowers men. I don't want women to start groping men, I just want to stop being groped!!! I hate it, absolutely hate it. I have knocked a few guys to the floor for slapping my ass or groping me. I feel the girls who do it because guys do it to them are just persuading those guys more that it's ok (or are harassing an innocent man). Most of the time when I talk about the amount I get approached, followed, catcalled or groped by a stranger to a man, they will have an example of a couple of times that they got touched up and how it really wasn't all that bad. They fail to understand what it's like to have it being an every day occurrence.
I had a female friend who had a reputation for groping guys, they often groped her and she liked the attention. It used to annoy me as my friends ex boyfriend used to then grab my ass thinking it was ok even though I told him it wasn't. The girl then thought it was ok to grope my friends new boyfriend at a Sunday afternoon horse show as we watched his girlfriend compete. He really hated it, he said to me he didn't know what to do or how to make it stop. I was furious with her, it was so beyond inappropriate and there was no reason he should have to put up with that because she's "just a girl" and he was a guy. But he had no idea how to broach the subject, and I understand him. I have tried to explain that I hate it to guys who do it and it has never helped. At best they've laughed at me and have continued doing it, and at worst they've got angry at me for "implying they're doing something untoward". And then I've ended up apologising to them, having to explain I'm just really weird about personal space. I'm not, I just don't like being touched up in public against my will.
People follow social and cultural norms, and seeing as rape statistics are pretty dam high and most women I know have some experience with sexual assault there clearly is something going wrong socially. It makes sense to look at what is happening within our culture to see if we can help remove this kind of conditioning (or at least make it more clear that it isn't acceptable), and then see if there's a result. Even in the past 5 years I've noticed less movies coming out with "rapey" comments.