Apparently, Electronic Arts has designed Battlefield 3 so players can’t shoot civilians. I actually would be more interested to see a system where you can shoot civilians but there are disincentives in the game to do so, maybe a a sliding scale where the penalties increase the more civilians you shoot at. If you think that players wanting to act out in a game is a problem, it might actually be more indicative of how strong that desire is to see what price people will pay to engage in it than to ban it altogether. It’s one thing to see what people will do in the absence of realistic restrictions, like investigation, court-martial, and arrest. It’s another to see what they’ll do under constraint.