Fester/Citabria happens to have two things that usually come together. Loads of piloting skill and an enormous uncontrolled ego. An ego which provoked some "explosions" now and then.
But see, in my own opinion his ego is proportional to his skill, so I'll never find his behavior worse than that of some people who have an ego SEVERAL times bigger than their skill, yet they never get a tenth of the attention Citabria has always had focused on him.
He has payed the price of being the best. As the best pilot around everyone was keeping attention on him to see what he did. Citabria has been the main protagonist of some bad moments in #1 channel...but also he has proven a lot of times to be the best pilot since AH's started. He's always been a joy to fly with, and most times to fly against, too.
Other guys add nothing at all, and are way louder on #1 than what Citabria has ever been, yet they never get the same deal of attention, nor they will ever get it in the future. I guess is the price of "fame".
As for the reasons of him being banned, I think he got kicked from the boards because he said something about the P40B added andd not a Ki43. Not sure about it, tho. In any case he has been banned from forums and not from the game itself. I've seen him online several times during last week.