Pretty much what PismoArcade said. It's everywhere to varying degrees. The current state of the world doesn't help either. Everyone is on edge, defensive, combative, and unwilling to compromise. People are just flat out mean. The old adage that the majority of humanity is good really has come into question these days. You try to get people to think of the bigger picture beyond themselves and they just laugh it off. People have stopped caring.
That being said, I don't find pinside to be as bad as people make it out to be. Even though people disagree, everyone is willing to help each other out when needed. You should see my wife's quilting forums. It's cutthroat over there.