I mean, torrenting is decentralised and not technically takedownable. But it was entirely possible to make it legally painful for people involved in it, as seen in eg. The Pirate Bay, megaupload or an entire cease-and-desist letter industry around individual torrenting users

Intentional noncompliance with copyright law can get you quite a distance, but there's a lot of money involved, so if you ever catch the wrong kind of attention, usually by being too successful, you tend to get smacked.

> I mean, torrenting is decentralised and not technically takedownable.

It's fairly trivial to block torrent traffic.