Another think to consider is that once people see all the dead dolphins and sea turtles, they might boycott BP gas stations here in the US. Its not even an American company, so i really think it could have an impact on their US sales. Also if the investigation uncovers any wrong doing by BP such as trying to save a few bucks by not installing a safety device, or not fixing reported problems, that will likely multiply the negative image of their company.
Full Disclosure: I am short BP and plan to short more if they report the dome works ( after the stock rises of course).
Boycotting BP gas stations would be futile. and would be of little financial pain to BP.
Gasoline is sold on the open market, The Shell gas you fill your tank with could have been refined by BP and vice versa....and the same for all gasoline stations. The total demand for gasoline would go unchanged ...i.e. BP's gonna move that gasoline somewhere!