BP and ExxonMobil ads

On Channel 34 at least, BP and ExxonMobil are pushing their GOODNESS hard. BP has a black lady saying she's from NO and represents BP's efforts to do the right thing for people affected by the spill. When I taught my course on Language and Public Policy, I occasionally wrote a company about the people in their (print) ads, and always they were actors or actresses. ExxonM is showing pictures of a clear fluid running through a spotless pipe. Now do they think the public is ignorant and stupid? Yes they do, and eagerly spend millions of dollars on these ads. A daunting problem for environmentalists. D