The further north you go, the crazier they get.
I'm phonefagging, but KPIX San Francisco is reporting multiple people injured. Two at hospital now, two on the way.
Police have not contirmed. They busy.
I'm sure that's part of it, but I also think there are several factions. The disgruntled anon who feels he has been dissed. The travelers from half and full chan pols, and those who just have a need to fuck with people.....
Also, there are anons who are called shills when they post an unpopular opinion.
Sounds like the situation is still fluid.