Wow. More than 30 comments already and no-one has brought up Microsoft killing the cpu if it thinks your copy of the OS is pirated. Must be a slow day. ;)

Some of the sites are for designated terrorist entities - it is already illegal to do business with them. (In fact there is a large fine attached.) No 1st Amendment protection in that narrow case, it just isn't enforced worth a damn (hello YouTube and WordPress, I'm looking at you), so maybe British pressure will raise the temperature a little.

Otherwise, no, there probably won't be anything done as lunatics and creeps of all stripes are generally allowed to say whatever the heck they want here in the US. It isn't freedom if only the right kind of speech is protected.

You missed the extra special terror for the agoraphobics who are already panicky about traveling in the first place: they're not so limited as the acrophobics, they freak out over all three dimensions.