The cops are fucking useless. I got death threats, bomb threats and a host of other shit and it's rare that the cops ever find the actor behind it. There is one particular "bulletproof" email hoster (the one with a bunch of very offensive and trolling domain names) that does absolutely zero cooperation with the police, and even if they did, it's likely that the other side uses Tor and the investigation ends there.

And if the other side is Kiwifarms and its associated offspring, the cops can't do anything at all. These guys are the utterly perfect storm - technically extremely competent but socially they're highly deranged narcissists.