@Hex @nullagent @Haste
Proceed with caution indeed. Electronic warfare is exactly that: warfare.
This isn't legally tricky. Law is dead in the US and if the cops know who you are after you dox one of them you will be targetted without regard for any law. If per chance doxxing them is legal where you live this will be no protection whatsoever. We KNOW what the Enemy will seek to do, that is right out in the open.
Rather it is militarily tricky: when cops get doxxed and it's gotten away with, that means our electronic warfare specialists went up against their electronic warfare specialists and defeated them. This is an ever-changing field and is a job for experts.
Tor, Tails, and cash-only transactions are the main weapons in such a fight. Just like any other weapons, it's the skill of the user that decides the outcome most of the time.
Note that the electronic battlefield is in fact a battlefield like any other, and there are no guarantees on it. Anything can happen, either side can win on any given day. So it always goes in war.