Are the civil courts and the laws of England on the side of the IOC in this? If a local pub had held an Olympics party, and the IOC said "you must pay us a thousand dollar fine," and the pub owner said," I don't think so" -- what would happen next?
What would have happened if the journalist whose umbrella was seized would have hit the seizers over the head with it, citing "stand your ground?"
(At least you could have an Olympics party at your own house, right? "An Englishman's home is his castle, sir -- while there's Law in England!")