Just reply something like: "as if you are the first rogue/whatever class in this game"
[edit] Or just ignore them :P
I don't get much hate though, most people throw compliments :)
[edit2] If they call you a faggot, report them to a GM, they will get a temporary ban (or a permanent one of it's their 3rd offence). Verbal abuse is not allowed, especially not when it's sexually explicit.