I agree with Kerron on this one. Boris is right on the Tube drinking issue, but please don't put it about that we agree with him ;)
It's not Puritanism, or nanny state thinking. In fact it's a view I have tended towards holding for a while. Put simply, there is a lot of aggression and anti-social behaviour around some drinkers and it is ill-liberal and unfair to subject other people to that kind of situation in an area which they cannot readily escape from.