Ben Wallace instigated this brawl.
I'm not saying he's responsible for Artest running into the stands and clocking people. He's not responsible for the insane fans.
I'm not saying he caused it. I'm saying that if he had not continued to rush at Artest, even after being ejected, if he had not been throwing towels at Artest, then the fans would not have continued to get incited. That beer was probably just a fan trying to throw the object at Ron that Ben couldn't throw, because he didn't have an angle to do so.
If Ben doesn't rush at Ron like an idiot and a madman, this event doesn't happen. Ron certainly tried hard at the beginning to avoid any incident.
This being the case, I think Ben and Ron should receive equal punishments.