Have you seen that one Eddie Murphy/Tyler Perry/Martin Lawrence movie Nanna Fatty's Circus of Sass? If you have, then I've already proven my point. Happy Martin Luther King, Jr. Day. For the counterpoint, check out "Cody's Least Popular Blog Post: Why All Black Comedians Are Doing It Wrong" here.
Movies are never more unrealistic than when they're showing us exactly what a dollar can buy.
I don't usually go in for conspiracy theories.