I'd love to know how they plan to block porn "by default." Either they'd have millions of people scanning requested images in real time or have a ton of false positives. Tumblr and Reddit, for example, are riddled with porn but are not "porn sites" per se. The same goes for many forums.

A UK judge recently sentenced a 21-year-old college student to 56 days in jail for a series of "racially offensive comments" written in series of tweets referring to a popular football player.

A lot of the laws outlined relate to filtering, tracking, and true violations of free speech. I think this example is poorly mixed in, however. It's certainly a British approach (and one I find many Americans friends have trouble getting their heads around) but having personal harassment as a criminal offence in the UK is a good thing, IMHO, and doesn't even come close to the problems of "free speech" (which is not absolute in any territory) - it's the textual equivalent of punching someone in the face.