Everybody should go over to Zilian's stream and click on the report button . Twitch is known to pull down streams where the person is caught breaking the game's rules / ToS.
If you don't know what to say, just copy and paste the following text into the description field and hit submit:
Quote
ZilianOP is a known botter in Diablo 3. We have definitive proof of him doing so, and I believe that it is in bad taste for Twitch.tv to support him by allowing him to make money off of his advertisements and subscriber button. He lies to his viewers about why his accounts get banned and asks them for real life money / in-game gold to help get his "new" account up and running (which, was an account he botted on as well). He is nothing but a liar and a thief, and it reflects poorly on Twitch for supporting him. I suggest that you take a close look at the evidence provided in the links below and reconsider who you do business with. Thank you.
http://redd.it/16ax94
http://diablowned.com/
http://media11.justin.tv/archives/2012-10-31/live_user_zilianop_1351664875.flv