It's a pain in the ass to have people run around killing innocent people just for the hell of it. Although it doesn't happen too often, there still needs to be a greater punisment than just a cash fine. Sending someone to jail for killing an innocent would work well.
My big beef with the game is the "Quarry Changed" bit. Just when I'm about to stab my target with a needle, or shoot him with the blunderbus, somebody either leaves the server, joins the server, or kills their quarry/hunter, then all of a sudden my time going after my target has been a waste.