I am completely against this censorship.
I'm currently living in the US so this won't affect me for a few years. However, I shouldn't be able to access BBC iplayer or other UK channels. With the help of a proxy server, I can view all of them and it took me about 20 minutes from looking for a solution to having one installed. I am reasonably tech savvy but the point stands that it is so easy for anyone motivated to do so to work around the porn filter.
At my last job, they had filters to block adult content, and there were plenty of innocuous sites that were blocked that would never be classed as adult. Most people will turn opt in because it will become too annoying to find anything worthwhile reading on the net.
I hate to say it, but I am a big fan of bdsm where a woman is undergoing some kind of punishment (not so much a man) and also have rape fantasies. Am I now suddenly a criminal or guilty of dehumanising women? I consider myself pretty normal, passionately believe in women's rights and equality, am staunchly against rape, and no one who knows me in real life would guess at this part of me, except my husband.
My children have laptops/kindle fires, and I am the administrator. They have the free but very good Windows Live family safety software installed on the laptops, and I get weekly reports on what they've been viewing. The kindle fire comes with brilliant controls anyway (and only I have the password).
I've also talked to them (youngest is 10) about the weird stuff on porn films and how people are always trying to do the strangest most outlandish stuff so that people will watch, and that very little of it is normal. That it's designed to make you want to see more and more (like smoking cigarettes). I also explained how once you see something, you can't unsee it, and that it can mess up your mind for a while. Even my youngest understood this, as the first time she saw a murder on tv, she was traumatised.
I feel that even if they do see something at a friends house, I will be able to deal with this because I regularly talk about internet safety and reinforce the message that most of what's available online is out of the ordinary.
Sorry that's so long. In conclusion; parents take responsibility, because the govt will do a useless job of it in your place.