An internet filter would be counterproductive

She argues that there are a number of technical barriers to imposing a state-enforced porn block and that the market already provides a number of solutions to allow parents, and not government, to make decisions for their own families.

You can read the article on The Spectator here. 

Summary

Dominique Lazanski, senior fellow at the Adam Smith Institute, writes in the Spectator Coffee House blog on why Claire Perry's proposal of a default porn filter for users poses a real threat to our internet freedoms.