Shylily got an answer from the Twitch CEO about Twitch's auto-ban system and why it's so hard to get an answer from Twitch about what the reason for the ban was. It's incredibly retarded:
Yes, mass reports automatically trigger a ban without any human involvement, and then the system automatically deletes the vod so Twitch staff can't view it to check what the reports were about or whether there was an legitimate violation instead of a troll campaign.