Well, as a vigilante, I try and stop all contraband trade, however, I have stopped a number of Slaver and Cardi Haulers, so operating in the Tau or Kusari/Bretonia systems might be better for me, and I have an undying hatetred for Outcasts.
However, accordance to real-life Vigilantes, they come in two variates.
1. Batman in Gotham City - or - a citizen trying to protect his city (small ZoI)
2. Superman Protecting the World - or - a grudge holding person who hunts down his prey, wherever in the world (large ZoI)
So, the Freelancer ID would be my best bet, seeing as my character hates all contraband...alright then!
Oh....I'm also executing any pirate I catch across Sirius above Manhattan...great RP fun...