As an ISP you're already required to report address allocation information to the regional registry who makes the associations publicly available. The police know whether they're looking for ISP staff or a customer when they show up at the door because as an ISP you published enough information for them to make that determination.
What does any of that have to do with police abuse against people doing nothing illegal?
They aren't going to jail. But if you run something that makes it difficult to tell whether you or just someone that you're proxying is the source of illegal content, you'll just have to accept that you're going to be an initial suspect in police investigations. That's kindof a part of the "route all information, even illegal traffic, through my network" decision that is running a Tor exit node.