'Catastrophe is a strong word, let's all agree to call it a whoopsie daisy.' It came as no surprise that this tweet was an impostor, written not by BP about its Deepwater Horizon oil spill in the Gulf of Mexico, but by a Twitter account called BPGlobalPR. The Deepwater Horizon oil rig burns in this aerial photo taken more than 50 miles southeast of Venice, Louisiana, on April 21.

Gerald Herbert/AP