I have to say something should be done about this
I was browsing the front page of the html5 games and came across this game called can-i which after about 2 minutes of game play basically devolves to torturing a cat with a Knife.
I know I would NEVER want my children to come across this type of game when they are looking for HTML5 games to play on the internet.
I think games with content like that should be hidden away behind some sort of paywall where you have to verify your age in some way to access.
I can't think of many people who want their kids coming across games they can play in any web browser about torturing cats with knives. (Now that I can state how that game ends, once I accidently cut the cats ear off moving my mouse around to try to find out what to do I stopped playing)