The largest piracy community is hosted over at !piracy@lemmy.dbzer0.com
lemmy.world has blocked it. It appears to have also blocked !piracy@lemmy.ml.
If this is a problem for you, I'd suggest migrating accounts using LASIM to an instance that doesn't block it (such as lemm.ee).
edit:
An official announcement has been made:
And this is the beauty of the fediverse right here: an instance decides it doesn't want some specific content doesn't mean the community dies. It just lives on on another instance.
Once these services can operate on the darknet like I2P (which supports anonymous torrenting btw), then things might really pick up steam.