Alcohol Ban in Westminster?

I have just seen BBC news and there was a group celebrating something outside the Palace of Westminster (I didn't say I was listening). The celebration consisted the group shouting loudly and drinking in the street.

Don't misunderstand me - I am not against drinking and do enjoy a drink - however I believe that Westminster council area is 90% no drinking on the streets. The penalty for this is £500 fine plus having the drink poured down the drain.

What I don't like is inequality in society - everything should be even and fair - and if I was wandering round that palace, shouting and swigging from an open bottle of wine, then I am sure one of the many policemen there (or women - fair and equal) would have a word with me and confiscate the drink.

So should these people be prosecuted based on the TV film evidence and should the BBC be done for encouraging them (I am sure if there was no camera the bottle wouldn't have been opened then)?

Just wondering what your thoughts are.