I did sign up. I have a T10 super-tank build with self-defence beams. I just sit and wait for them to try take my cargo. If you know what I mean..Faction doesn't matter, they just need to have big red "WANTED" letters by their name. (Easier to find in a HAZ Rez sight) they will give a bounty voucher that can be handed in by KIDD station.
Make sure to sign up to the CG in the missions tab at the KIDD station BEFORE you go hunting.