I've seen people on Facebook going on rants about how if they see any clowns, they're shooting them because this behavior is unacceptable, and nobody better dress themselves or their kids as clowns for Halloween this year because they're going to be shooting any clown they see.
Overreaction much? I get that it's unsettling, and kinda a dick move, but that's just blowing it out of proportion entirely. I'm not saying that the people doing the clown thing are completely in the right - if you want to scare people, get a job at a haunted house, dude, that's really the only acceptable time and place for it - but they're (for the most part) not doing anything illegal, so maybe chill a little bit?
I'm someone who's a big proponent of not bringing people who can't handle it to haunted houses and then telling the actors "don't scare my friend" - it's my fucking job, dude, don't bring them you asshole - so I'm also team "don't try to scare people outside of the appropriate context". There's a time and a place, see above paragraph.