One group that gets beat up on a lot is vendors. There's a healthy debate that comes and goes in the channel about whether it's good to have a place to vent, or if making vendors the butt of jokes limits their interaction in the community. One of the great strengths of the channel is that the norms are constantly in flux and openly discussed and debated.
Don't be too sensitive ===
Of course, political correctness can sway too far to the conservative, and what fun is that? Don't always assume that the jibe you took in the channel is meant personally. It is usually safest to always give the speaker the benefit of the doubt. So many non-verbal cues are missing in this medium, it is just a virtual conversation after all. === Be willing to laugh at yourself === I've found that making fun of myself is a safe outlet for being bitingly clever. And once you've shown people that you don't mind being a target, they'll let their hair down and pick on you too. Besides, why not beat everyone to the punch.
=== Don't be intimidated by what looks like the "in crowd" ===