I think twitch is being horribly inconsistent on its banning practices. It's bad enough you ban channels "by mistake" as that really throws the moderators into chaos. Worse, you ban channels based on random snitches who either are just trying to cause trouble or are trying to eliminate competition.
I also don't like this policy of banning for "copyright violation". There are channels you don't touch that are showing more recent stuff that channels you've removed. Frankly, since these channels are generating ad revenue for you and nobody is downloading the content, I don't believe copyright is an issue, especially since the content is usually 10 yrs old or more. I pay for turbo, and the more channels you ban, the less reason I have to pay for anything. You're gonna lose customers that way.