Hippies, meet Mr. Beatdown. Mr. Beatdown, hippies:

Greenpeace had hoped to paralyse oil trading at the exchange in the City near Tower Bridge on the day that the Kyoto Protocol came into force.
...
Protesters conceded that mounting the operation after lunch may not have been the best plan. “The violence was instant,” Jon Beresford, 39, an electrical engineer from Nottingham, said.

“They grabbed us and started kicking and punching. Then when we were on the floor they tried to push huge filing cabinets on top of us to crush us.”

Yeah I know, "don't take pleasure in the suffering of other people", "violence never solved anything", "ah, a Buddhist laughing at people getting beat up, how rich", yadda, yadda, yadda. Look, if they weren't so completely obnoxious and, well, wrong, I'd have a little more sympathy. As it is, well, I am glad nobody got killed, and actually I do feel rather bad about the guy who'll have his mouth wired shut for the next six weeks.

But I cannot think of a more abject example of what can happen when happy, shiny, soft-headed idealism meets the hard-knock world of reality. Look, nobody ever said I was a good Buddhist, ok?