What's with the hostile tone lately?

I've only just begun to notice that the volume on the posturing and list debating has gotten a little loud and in some cases unprofessional lately. What's with that? I, as much as the next person, believe in the value of open forum
the airing of dissenting views, and good debates. But it seems to me that people have been holding in some hostility and resentment towards entire groups of people (against IA's for instance) and have even resorted to name calling. Maybe it's the economy, I don't know.