Oh, you're from a long long long time ago! Well, calling someone a troll is slang. It means they're idiots and assholes and jerks and their whole purpose is just to get a rise out of you.
And it happens everywhere. I'm a pro gamer and you wouldn't believe how often I get that shit online. Like, I have fans, but there's still a ton of creepy guys that talk about my body or my race. They just want to make you feel bad because they're miserable themselves. So don't play into it.
Plus it helps to have awesome people around to kinda pick you up after those dicks bring you down.