Twitch TV – a gaming TV channel with billions of watchers – will attempt to detect music playing in the background. If a 10 second spell seems to be copyrighted, they will remove the sound for half an hour.
I suppose the rationale is that the music companies and the RIAA think this is a potentially lost sale or something? It’s not surprising the users are up in arms about this.

Twitch Cracks Down On Music In Videos, Users Freak Out.