Even one of Boris's supporters Iain Dale claims to find banning not so great (not sure where he stands on banning guns then - but that's by the by) "As a liberal Conservative I instinctively recoil from banning things. However, is it liberal to allow tube users to be abused by drunken louts? No, definitely not. I think this policy will be welcomed by many as long as it is policed properly."
Yes I'm sure we can rely on the new Mayor to police it properly. He got a lot of practice in this morning, just by wearing a policeman's hat. Check out The Sun
By the way loving, Iain Dale's ads for Laithwaites wine all over his blog. It's great that some people can be trusted to booze responsibly and yet it appears there might be a blanket ban on booze.