I agree with you that people shouldn't judge people by their appearance or the groups they're in. But sadly it happens. Not just in FH but in real life too. If someone sees a group of teenagers wearing black clothes and black make-up they almost immediately think 'self harming emos'. Or people hanging around a corner smoking and wearing tracksuit bottoms tucked inside their socks, someone will instantly think 'chavs with ASBOs'.
It's one of those sad facts of life. We can't stop people doing it and it will always be a problem is society.
When I see one of those bright neon characters that look like they've been attacked with a paintball gun, I don't immediately think 'troll', but I am sort of wary of them because a lot of trolls have a habit of looking like that. Unfortunately, I think the trolls have given the bright neon people a bad name, and I bet the nice people who run around looking crazy are pretty annoyed about that.
I don't think I've been judged by how I look or the people I hang around with...at least not knowingly. I don't really think about of my characters fit into a FH stereotype regards to their appearance. But I bet that there are some people out there that think I'm one of these "Let me wipe your butt for you Mr. Mod" people, just because I like to chill with Red and co. Which isn't true of course; I chill with them because they're genuinely nice people that I would gladly called friends. But people will believe what they want to believe and I can tolerate that, just as long as they don't try to enforce their beliefs onto me.