If the gov want a simple tick box opt in on the routers, I cant possibly see a problem with that.
Note: I am uber liberal on this. I would never tick the box. But I only speak for me, I understand the net and have my own views on porn etc. How ever, I dont seek to impose my liberal views on others. I simply want us all to have a reasonable choice, that we make our selves. I want "wet" parents to have their option, so that I can have mine. Their freedom to chose is as important as mine.