I FINALLY FIGURED OUT RIGHTEOUSNESS!!! Sort of...

You get points for snake being in jail or line up. As far as i can tell he is the onlyncrimminal you need to keep off the streets. Legs and Louie do nothing for me that I can tell so I have them do the 12hr visible task. You get points for cleaning up graffiti in your own town or a friends. Also nail sideshow when he shows up. I'm normally a 5 except when bobs around or I have snake doing other tasks. I guess you could lock up the arms dealer but I don't know if that would help.