I think that dickhead got what he deserved. He was disrupted a private function, he was asked to leave. Just look at the video when they are attempting to escort him out. That screams of resisting arrest, he was putting swim moves and all types of jukes on the security. Even notice when he was on the ground, he was resisting the officers they were attempting to get his arms behind his back and he wouldn't let them. They were well within their rights to tase that little D bag.
Look at this video... The guy is bouncing around like a maniac, and this is where I was referring to his arms.