I am not part of the Twitter generation. You may have guessed that. So can anyone explain to me why Chloe Cowan decided to pester James Bulger's mother online about his murder (many years ago, before Chloe was born), pretend to be his murderer and also his ghost. And why, when she was found guilty, was she sentenced to prison instead of a hospital for the what we used to call "the criminally insane". The things that go through my mind are: did she think it was OK because everybody does stuff like this on Twitter; it is not OK but I can can get away with it because it is anonymous; she is vulnerable so I'll have a go at her; I'll get to be famous as a Twitter Headbanger; or anything? I have no idea. I just think I'll carry on avoiding Twitter.