Not My Problem

One of the best ways to stop a troll or a flamer. If someone's coming up to you and says "this sucks" or "I hate this" or "your art is gay" or "you're gay" or whatever, the best response is "not my problem".

Despite everything, there are always going to be people on this site (and elsewhere) who think they have been promoted to almighty art god and have the right to decide what is and isn't art. This phrase is also an excellent way to respond to them. As long as your work doesn't violate the terms of service or etiquette policy, then if someone thinks it's not art, let them - it really isn't your problem.

Let people know you're not going to be riled by their bullying. They do it for attention. If they know you're not going to give them the satisfaction then they will eventually stop wasting their time.