.net column: I read the news today, oh boy

Another of my .net columns has made its way to them thar internets:

There were four interesting news stories this week. The Home Office decided that it fancied a giant central database of everybody’s internet activity, something that would be perfect for data mining in search of thought crimes. A student was detained for six days under antiterrorist legislation for downloading documents from the US Department of Justice website. A well-intentioned but badly drafted new law could put manga fans in prison as suspected kiddie-fiddlers. And Boris Johnson banned booze on the London Underground. Only one of these caused UK internet users to take to the streets in mass protest. Can you guess which one?