I've jumped through the hoop once already
Virgin Media (my ISP) have already caused me (by nagging with an injected browser tab) to visit their website and log in to tick a box to indicate that I don't want 'family protection content filtering' i.e. porn block. So why do they need to do any more?
Also, on the very few occasions when I've accidentally clicked on a link to a well known torrenting site, they block access and show me a page that says I'm trying to be naughty and the courts have told them to stop me. Let the government put court orders on them and let us see exactly what has been denied to us.