You know, for me, I have no problem with those who are negative about the team, per se. What gets under my skin are the "I'm smarter than you" attacks on other posters, with a majority of them coming from post-drought fans. ScottLaw, for example, has a long reputation of negativity. But, I've never seen him call another poster "stupid." He debates football.
Maintaining negative opinions about some aspect of the Bills isn't what makes this forum toxic, IMO. In fact, opposing viewpoints, regardless of how extreme they may be, if stated respectfully will inspire debate. It's the personal invective-- even just in tone-- that sometimes makes this forum look like a bunch of Pats* fans, and utterly stymies debate.
That's my whiney 2¢.