Honestly? Why bother report them when they'll likely ditch us in a week or two.
Why waste energy?
The police tag is really hard *not* to get, considering it starts... What, two or three bars from full? Thats like... Three Rogue kills.
I find it interesting that NOW the Police tag is an issue when I've seen hundreds of different ships with such a tag in my time here. It really wasn't a problem a year ago for default characters, I don't know that it should be now.
Police tag - Generic (Trader) ID.
Police tag - Generic (Mercenary) ID.
Police tag - Generic (Miner) ID.
Stay online for about an hour, I guarantee you'll see all of these within that time just hovering outside of Manhattan. It's been going on for forever now... Have you just recently noticed that your breathe? Or that there are trees outside? (Not meant to be condescending, just an analogy) The Police tag is used as a default lawful tag for generic ID'd players.
It'd be even more OORP to go explode their depots to get rid of it, so why worry so long as they aren't Pirate ID'd or some such?