think i know what you mean and there has just been a prime example in 1 of the many Anton threads.
Discussing the rights and wrongs of the move, how much etc, then newtonlee posts Agent Bruce Out!
Why, it has nothing to do with the thread in question, and then it trascends into a Bruce in/Out argument and goes completely away from the OP, so gets all negative (lets be honest there isnt a lot of postive talk even for Bruce in camp, even i admit that).
If its a Bruce out thread, fine post that, if its a Bruce in thread, fine post that (but a bit more from him would be nice) but when it has nothing to do with Bruce and we still get the bruce out crap, I just shake my head.