Re: "blocking ... between 1 and 50 sites a year"
Looking at the action the government is taking I feel like I can say with some certainty that they haven't got a bloody clue what they are doing and this is entirely to grab headlines and allow them to say at their party conference that they are "thinking of the children"
Dailly Mail politics take a subject that the DM have got their readers in a froth about. Introduce a law where you ban or encourage or restrict whatever the DM don't like/like. Get more votes as a result. Doesn't matter if the whole thing is dumb and unworkable.