Depending on the policies at your job, if someone is making it a hostile environment for you or anyone else, that's grounds for at least disciplinary action "up to and including termination." If they're really making it an uncomfortable place for you to be, tell them that. And, if it doesn't stop, I'd start taking it up the chain of command. It doesn't always work, and, you know your company well enough to know if it would be worth the effort. My guess is that they're just playing around with you. If you're that kind of person, just play back with them. You know, the whole "if you can't beat 'em, join 'em" thing. If you're really sensitive about it, or if they're genuinely being hateful, I'd say something to them, and, then take it higher if you can. Or, if ignoring them works, just do that. But, always keep a smile on your face, cuz no matter what the situation, that always throws people off.