I for one fully support the police here in the UK. (I was going to try and join before those idiot bankers and Labour ruined everything.) They are under constant scrutiny from the public and the media so that when they do slip up, or someone makes a bad judgement call its front page news and usually in the worst possible light.
Yes. They fuck up, the death at the G20 riots could have been avoided, but imagine being there yourself - you'd be full of adrenaline and wound up so tight only dogs would hear you fart because you are vastly outnumbered and if someone decides to start something and people get violent you are the ones taking the brunt of the shit storm.
The police here are on such a tight, politically correct leash that they are nearly powerless thanks to the government with things like arrest quotas and mountains of frivolous paperwork getting in the way of proper police work. (Like putting the boots to pack of teenage yobs terrorizing and assaulting defenceless families. And I don't mean the group-of-mates kind that just get a bit rowdy in the park after sneaking some bottles of cheap cider from the off-license, I mean the ones that prank call the fire service or set fire to cars just so they can throw bricks at the fire crews and vehicles.)
The problem isn't with the police. Granted there are a few bad apples but the same can be said for any other walk of life.
The problem is with greedy, idiot, out of touch MPs passing laws to protect the lawbreakers - "I was only breaking into this family's home when some guy came out of a bedroom and beat me sensless! I don't know why he did it."
And as this rant winds down for the end, if you abide by the law you have nothing to fear from the police. Yes, some laws are stupid - we know that, the police know that but the police are still duty-bound to uphold them so give them a break.
And for the folks who have done something they shouldn't have and are now butthurt about their subsequent run-in with the po-po, I have this piece of advice: