The internet is full of junk. A staggering amount of junk: 1 million websites launched each day; billions of packets of content also tweeted, bookmarked, shared or otherwise thrown into the bubbling cauldron of human endeavour. Apparently, there are even 2 million ways to unlock a sink. OK, there are 2 million websites that claim to show you how to unblock a sink. Some do. Most don't.