Here is the Full 28 Minute game where Tarzaned purposely griefed.

All the evidence and proof needed is right there. No one who watches it can defend his behavior. I want to remind everyone that other people griefing or flaming does not make it ok for anyone else to do in game. You hurt me so I hurt you is not a defense. Why hasn't Riot acted on this yet? This isn't a debate of whether or not he did something wrong. He did, as is shown in the Vod. This is someone who influences a huge part of the community. It needs to be dealt with not just for him but to tell his supporters and everyone else that that behavior is not acceptable.