Now that wouldn't really be a good thing exactly, some censorship is all right, but granted too much and unreasonable censorship is worse than no censorship at all. For example, you definitely wouldn't want a 6-year-old kid to see a scene of two advlts sixing each other up with all the juicy details shown on the screen. That and excessively violent scenes with people's body parts flying off of them and getting blown apart is something that actually could cause certain mental issues in small children, IMHO. However, the problem is that certain advlt people tend to think that, since they are reminded of six whenever they see women's nipbles, small children are reminded of the same thing - so they think that therefore seeing women's nipbles is obviously just as wrong as seeing a juicy six scene. However, anyone with any bit of sense in their mind will agree that when a 6-year-old child sees advlt woman's nipbles it will not instamagically get the image of six pop up in its mind thus scarring him forever.
The extreme violence I can see messing up a 6 year old, at least giving him a few nightmares (I turned out relatively fine though) but the six scene? Not buying it, with proper explanation from a parent I don't see how a child could be harmed by knowing what six is and how it works. When I was about 7 or 8 I knew all the juicy details, I never really bought the whole stork thing anyway.