Films should at all times should add scenes which show the consequences of those serious violations. Songs should at all times have a chorus that show the consequences of those serious violations. Books same thing. Of course, the media will get quickly boring when they are forced to follow a recipe.
It would get boring if the consequences were tacked on in predictable way like the disclaimers and warnings at the end of a prescriptional drug commercial on TV. But the idea of writing realistic consequences into the plot of a video game is interesting. And I don't mean simplistic stuff like "if you shoot civilians without justification, you may bet caught and thrown into the brig". How about a "reputation meter" which would indicate how others view your actions. As it got lower, your enemies would be able to justify the use of more agressive measures against you and parties which had been trying to stay out of it might join in and start fighting you.
This is a pattern which has played out in numerous real wars. Rushing in with advanced weaponry and shooting the place up is fun, but the neigbors really, really resent it. Break too much stuff, shoot to many of the 'wrong' people, disrupt their lives too much, utter too many threats, strut around too much, and they will get angry and try to put you in your place. Before you know it, you will be caught in a quagmire.