Eh, differences in times/culture, I suppose! Things were a lot less violent years ago, at least on screen, so I guess I can sorta see where your parents are coming from.
The last thing that got to me was Until Dawn. I'm a chicken, so I mostly watch horror LPs, since I'm curious but too chicken to play it myself. That one had me nearly gagging a couple times, and wondering why I was watching but I just...had to know how it ended! Overall it was an interesting game, but extremely gory. Like, Saw gory. >.>;;;