You know, I always wonder about this. Basically that I played some "violent" games, like the SNES version of Mortal Kombat 1-3 [pretty tame by today's standard] and watched Wile E. Coyote get his face smashed in with anvils and boulders and saw the A-Team beat the crap out of bad guys every weekthe only time I've ever spent in jail was playing Monopoly. I always figured that my parents realized that they did a good enough job instilling the difference between fantasy and reality [granted I also grew up playing with realistic looking guns, because none of us were dumb enough to try to point them at people who weren't in the game] and didn't feel they needed to helicopter.
The second part to this is that I can actually remember being a kid. And figure if I turned out alright, I just need to teach my kids that this is a fictional and in real life, getting your head exploded is not as fun as it looks. And if I don't do a crap job at being a parent, hopefully they will turn out alright too. Obviously, other parents and their little brats are another matter, but I just learned that by not associating with them, I didn't get into as much trouble as they did.
Back on topic though, you just gave me an idea. Between recently got a game in the mail, having a conversation about a localization oddity relating to a second vintage game, and explaining what the title of a third game means to my kids, I feel that the universe is telling me that there is an answer for this. Just going to have to examine a few things to see if it can be done the right way.