I'm leaving for the UK today, but I won't be going to any parties — especially not any all-night parties.
I'm aware that US cops can use excessive force in busting up a party — a political fund-raiser at that! — but the difference is that by all accounts the US cops were acting illegally and used excessive force. It appears that the UK cops were just a little enthusiastic about enforcing a pretty draconian law.
Even so, it's instructive to recall that although the civil liberties situation in this country is in many (but not all!) respects at an ebb, things are in fact worse in several other liberal democracies. I'd take French health care, but not French cops or treatment of minorities. I'd take British tolerance for middle-class dissent and eccentricity, but not the intolerance for young people enforced by ASBOS. According to the worn notices tied to lampposts in the part of Manchester I visit there was, and maybe still is, an ASBOS order in effect which pretty much makes it an offense for groups to congregate on the street in the evening. In practice, I imagine that it's a license to arrest young people, at the cops' whims.