As a parent, I am not sure where I stand on this one. As far as my own kids go, we screen movies and games beforehand. We don't have to screen TV as much since we don't have TV service (Our TV is hooked up to a DVD/VCR, Wii, and one of our gaming towers). I won't buy violent games for my kids and I won't let them have them in the house. WOW involves killing, but it isn't the type of explicit violence that people are talking about. I don't even know how i could defend letting kids pretend to kill other people in such a graphic medium. Playing Cowboys and Indians is something kids have played for ages, but it never including graphic depictions of shooting, scalping, or other blood and guts.
Bottom line, these politicians are trying to force responsible parenting on the rest of society. If a parent doesn't have a problem with the game, there is no law against a parent (or an adult over 18) buying it for a child.
Buuuuuuuuuut, I don't like regulation

I suppose if it were an outright ban on the games altogether, I might be pretty ticked, but it isn't against the law for a kid to possess the game, just to purchase it in the first place. I think all they are trying to ensure is that there is some parental (or adult) involvement before they pull the proverbial trigger. It is sad that some people feel the need to legislate this sort of thing, and sadder still that it appears to be necessary in some cases.