The stunt also created publicity and attracted press to an issue that otherwise wouldn't have existed. Would you prefer the Bhopal victims suffer in silence?
They talked to some of the Bhopal victims in the Yes Men movie and they seemed to be happy about it, even knowing it was a spoof, because there was at least a little hope that it would draw some attention to their plight.
Obviously there might be a selection bias in the people they interviewed or the interviews they put into the final film.
