[AlyssaRowan]

I do note that the government have already mentioned aloud the possibility of coercing ISPs to use these filters to block foreign porn sites which wouldn't get a BBFC 18R (see the ATVOD crap we've been having over here).

That's a lot more sites than you might think.

[zimpenfish]

Oh, I don't know, I can think of loads offhand that would be caught - even more if they applied the 18R rules to static images as well as VOD.

But I'm not surprised it's already on the cards - this has been coming since the early 00s (e.g. the "usenet is CHILD PORN!!!!1!!" newspaper outrages, the Sexual Offences Act 2003, etc.)