Sick of fans running onto the field...?

I think the solution to all of these fans running out onto the field would be stiffer penalties. Also, I think it should be known that, if a person runs out on the field, anyone who is legally on the field, players, coaches, umpires, bat boys, security personnel, should be allowed to do whatever they feel is necessary to get them off of it. I think if you were to see a few more of these boneheads getting the snot beat out of them, it would happen less. I think all it would take would be for one person to get cracked on the back of the head with a bat, or maybe catch a forearm from someone like Prince Fielder to put an end to it.