how is it a double standard, for a start it is two totally different things, also seen as having different media formats. It also is more or less built around morals, which aren't based on a lot. Those morals are different for violence and porn. Although there are a large portion, who would love to see both fully banned.
Well yes there will always be people who want everything banned. The morals behind the blocking of porn has nothing to do with any tangible fact as far as I'm aware. They are simply 'because' we think they should be restricted. Yet violence certainly has far more weight behind why it should be blocked but it is just ignored. That is a double standard to me. The one with more reason to restrict access isn't restricted at all while the other is just restricted because it always has been.