In 2005, at the London Oil Exchange, a large group of Greenpeace protestors attempted to shut down the exchange with a protest. They forced their way onto the floor and attempted to send airhorns to the ceiling with ballons. The protestors weren't aware that commodity traders are not a bunch of public school prigs, they are typically from the lower middle classes. Also, they planned the attack after lunch when most traders have had more than a couple of pints. Hilarity ensued...
The trespassers were set upon by traders, most of whom were under the age of 25. “They were kicking and punching men and women,” said a photographer, according to The Times of London. “It was really ugly. … They followed the [Greenpeace] guys into the lobby and kept kicking and punching them there. They literally kicked them on to the pavement.”
“The violence was instant,” reported one aggrieved recipient of a rain of blows to the head. “I’ve never seen anyone less amenable to listening to our point of view.”
“Sod off, Swampy!” shouted one tardy trader, steadying himself against the railings of the balcony of the pub across the street as his colleagues threw the protesters bodily onto the sidewalk. (Swampy was an enviro-protester who gained fame by living unbathed in a tunnel for eight months.)
And the famous anti-environmentalist slogan "Sod Off Swampy!" was born.