*deep breath*
Alright. I'll stop with the raging and stuffposting if everyone else does.
FlatFlyer posts about birds a lot. Ok. Cool. Just because you don't like it or find it annoying doesn't give you any right to tell him he has to stop it. That's oppressive, selfish and unreasonable. The internet is not a dictatorship, it's a free, public ground and this is a (semi) public forum. You can be a birdbrain if you want, there are no rules saying you cannot be yourself.
If flat was actively trying to cause problems by doing this it would be an entirely different story, but he isn't, he's just being himself. If you don't like it, the right thing to do would be to simply ignore him and move on, but you people are instead trying to bully him into changing his ways against his will. And I don't think that's right.
I apologize for my initial reaction, but I have been in this exact situation countless times before and thus the topic is rather touchy for me. Add the fact that I consider Flat to be one of my friends, and yeah, I got pretty angry.
Again, sorry -- there's no reason we can't all kiss and make up (figuratively speaking of course).