I dare say- we are the best, most well behaved and nicest fans in the entire world. I legitimately believe we have the worlds best fanbase (which is why I never believed the racist VB crap); however, we can still be critical of poor play. It is part of elite sport. The players know this, the coaches know this. They signed up for it.
But... the OP went as far as to suggest mass bans for negative posters. I just don't believe it is a realistic expectation at this level of sport to suggest such a thing. I do not think that the board and our fans are overly negative. I genuinely think our fanbase and board is exemplary in every possible way and a great example of our faith.