How idiotic can people be?

So, today is the final day before the drinking of alcohol is banned on the London Underground network. I've posted my thoughts on this elsewhere, and it's pretty much a textbook definition of gesture politics. It's going to be popular with the simple minded, but there's not a huge amount to object to over it. And I must say that I've always been surprised that it's not been banned before now.

It's obvious that (in these days of social networking, especially in London) people would end up doing something to celebrate the last day/protest about the introduction of the ban, and it's good that it was expected and plans were made for it by TFL and BT police.

However, if you're someone who disapproves who is attempting to show their dislike for the new rules then what would be the absolute worst thing to do? Yes, you guessed it. Have hundreds of pissed, excitable people descending on one station causing its closure on a Saturday evening. By doing that you're showing the ban to be a fantastically good idea. If you wanted to show the flaws in the plan then organise hundreds of people to be on the trains having a quiet drink not causing any problems whatsoever. That would make people realise how flawed the plan is. Not this. All this will do is make normally rational people think that, perhaps, the ban might be a good idea.