Most people probably don't need further reasons, but for the undecided among you, consider these:-

1. Allegations by BP's deepwater rig partner Andarko Petroleum who have openly accused the company of being "reckless". James Hackett, chief executive of Anadarko Petroleum, said it was considering "contractual remedies" for what the company has described as BP's "gross negligence or wilful misconduct" over the spill.
2. BP's increasingly desperate attempts to stop the flow of crude oil following the rig explosion have demonstrated a total lack of workable disaster / contingency planning.
3. Thanks to lax US and UK laws (allegedly watered down by oil-industry lobbyists), BP was permitted to operate the rig without the use of safety devices such as the acoustic switch blowout system. This fail-safe device costs a half a million dollars to implement, but BP appears to have decided that this was an unnecessary expense. Yet another legacy of the Bush/Cheney administration.
4. While people died and others continue to risk their lives to contain the disaster, BP top dog Tony Hayward swanned off on a rich-boy's yacht race.
5. Instead of gratefully accepting their help and focusing on the problem at hand, BP's lawyers attempted to gag fisherman volunteering to help with oil spill clean-up efforts, by forcing them to sign away their right to free speech, from holding BP harmless for any accidents that might occur, and requiring them to give the oil giant a month's notice before filing any legal claims.
6. Despite preliminary estimates of a cleanup cost running into billions, along with BP's average net earnings of close to $20bn per year for the last 3 years, sailing-boy CEO Tony Hayward has decided to proceed with dividend payments, before the cleanup costs can even be properly estimated.
7. BP has a poor environmental and safety record that dates back for decades. It was named by Mother Jones Magazine as one of the "ten worst corporations" in both 2001 and 2005 based on its environmental and human rights records. Between January 1997 and March 1998, BP was responsible for 104 oil spills.
8. In recent years, BP has been implicated in a number of gas price manipulation scandals. Detailed allegations by federal investigators that BP traders illegally manipulated propane prices in 2004 and formal charges brought against BP by the Oklahoma Attorney General left BP executives squirming and red-faced, but did little to change their ways.
9. On the local front, BP has a long history of always being the first to increase fuel prices at the pumps and the last to reduce them - so much so that fuel price increases are refereed to in New Zealand as: "the BP subsidy".
10. At the same time, BP have demonstrated that they don't give a damn about their forecourt customers and have managed to take the last remaining vestiges of "Service" out of the "Service station" by mumbling something incoherent about health and safety laws, without being able to quote chapter and verse when pressed. This has even extended to one station refusing to assist a disabled driver and ordering him off the forecourt for apparently "creating a safety hazard".

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The only thing that governments and corporate interests still fear, is public opinion.