What's Wrong With a Game About Dead Bunnies?

So What’s Wrong With Dead Bunnies?
Ahhhhh! Splat! Ewwwww...

My kids have been complaining about the Internet filters we put on our PCs to prevent them from accessing inappropriate content. It’s a parent’s right and duty: right? My oldest is quite the crusader and may just be a budding Civil Rights lawyer.
Nevertheless, these things are necessary.
In protest, they have changed the background on one of our laptops to an image of a cartoon with a circle and slash over it, the image that they see indicating that inappropriate content was being accessed;
They insist that these filters block everything, even really uber sites such as Road Kill Bunny. I suggested that perhaps the word “kill” in the title may have had something to do with it. Of course, they disagree.
Anyway, for now, counsel has busied himself with other matters. I do expect more protests over this issue in the near future. The question becomes, however, when are kids old enough to decide for themselves the content that should be displayed? I would say that as long as they remain kids they do not have the knowledge to decide these things for themselves. It is the duty of the parent.
And so the argument continues.