I came across this story of how a Big Oil (Chevron) PR campaign was hijacked by a group of activists calling itself the Yes Men. Definitely worth a read.
As an example of other past interventions by the Yes Men, the report then included this clip from 2006, where the Beeb was fooled by Yes Man Andy Bichlbaum into believing that he was a spokesman for Dow Chemicals talking about the Bhopal tragedy and Union Carbide's role in it. I had never seen it before. It is unbelievably funny and I thought I'd share it here, not only as a testament to the creativity of these environmental activists but also to the gullibility of the media (even the BBC screws up big time some times!).
Enjoy! I would have loved to have seen the faces of Dow Chemicals management while this was on air.