The whole internet censorship doesn't make any sense to begin with. We already have decades of free online porn and everyone is fine. Why would we try to limit porn usage online now? It's a cry for regulations from overprotective nannies. These blocks don't work anyways as it just needs one single kid with access to porn and they'll share it with the others. To believe we can control that is crazy.
No tool in the world will block new sites emerging not yet added to the filter or people from installing an uncensored browser.