Totally agree with all the other girls on this!
Here's an example for when it's really pissed me off, a guy who was fairly regular to my room yet hadn't tipped yet was in my room, then leaves my room for a while, comes back angry about how he'd taken a girl private and halfway through she'd taken a pm from a jealous regular and cut off the private. I was like, 'wtf? I've been here all night, you haven't tipped or offered me a private so don't go moaning because instead you took a model you haven't talked to before'. Really annoyed me! He did tip the rest of his tokens and still comes into my room, he's chatty and I like the guy so it's alright, but still.
Also sometimes when you can see someone's tokens, they're in your room for ages all the time, have plenty of tokens but don't tip, then they skip out your room but you've still got them clicked on and start seeing the tokens disappear because they've taken another girl private! That is very frustrating if it's a slow night!
This may sound bad, but I don't care if people go visit other girls rooms, half the point of mfcs is variety! But I do care if they tip them, especially if they're tipping them and not me. Sometimes when you check out another girls room and see a regular there it's tempting to see if they tip/how they talk to the other people in the room etc.
I've been upset when one of my regulars who I'm very close to admitted he's tipped another girl quite a few big tips. He was very honest about it, and fair enough, it's his money, but because me and him spend a lot of time talking, and at that point I don't think they'd interacted with each other that much, it made me feel a bit gutted.
If I do perve as a guest/basic and I see someone I recognise from my room I will vaguely keep an eye on them out of curiosity, or just pm them.
After camming sometimes I'll perve round with regulars, will usually be just me checking out girls I want to look at and them following. I kept trying to catch Fluffs mad blowjob skills! Was worth the wait, that's some crazy skills!
I have this really annoying regular who tips tiny amounts and always asks for a request, I think it's the way he says it. Often the requests are just biting little finger etc, but when he first came into my room he wanted me to wear a dress for private and totally wasted my time by wanting me to show him loads of different ones etc, then the private lasted like 300 tokens. He often asks for 'catwalks' and to see different outfits etc. Anyway he's pretty much the bane of my life lol, he's pretty harmless and takes it pretty well when I tick him off, and does tip although very small amounts. Anyway I was looking at another girls high tip screen shots, and there was this one tip just before I'd met him where someone else had tipped the massive tip, and then this guy had also tipped 20 tokens saying "so and so.... pls do a catwalk for me naked wearing heels...?" or something similar, and also ridiculous as he's going into a fully dressed top models room expecting 20 tokens to get her naked, in heels and doing a catwalk for him! Sometimes it's almost reassuring to know that the idiot regulars also badger other girls! This time it just made me laugh!
I wouldn't worry about it too much, like the other girls said though, best not to rub it in! and isn't there a way to be present in more than one girls room at a time?