Now.. I don't know if you spectated the whole RP action or just the beginning of the shooting.. You probably saw the beginning of the shootout and consequently reacted thinking about a mass DM. The problem is this action had RP bases.
I was spectating what happened from about 5 minutes before this happened.
The initial plan seemed to be to attract some cops to fight with, but as they got ordered to stay away and not to engage, this fight was the alternative to obtain the orange colour.
As for tempban, I tempbanned mainly those who were clearly shooting or had already killed others at that area. Nobody was banned for just waving a gun or running away.