My parents don't understand gaming. Except for some stuff on the Wii.
Up until I moved out to go to high school (a private boarding school) movies and games that had ANY language, or even the tiniest bit of violence over the level of Wind Waker (which is the only game we had at the time that I played) were "prohibited". My dad got pissed once because I downloaded the Jedi Knight 2 demo on MY OWN, laptop to see how much better it ran compared to our old machine....which is odd since the JKII violence is about as much as they have in WW.....He also took a Bond FPS game for the gamecube that I got as a christmas gift (from my Grandma no less!) and sold it on eBay because it was a shooter.
Fortunately I was introduced to GTA3 shortly after arriving at the boarding school and haven't turned back since. I always had to hide the higher rated games when I was at home, and once they moved up to the town the school was in it was difficult, but I got by. Now I live on my own and can do whatever the hell I want, so it's great. They know I game, but they finally figured out that they can't do anything about it.