How NOT to do PR

Several stories in the news recently about bad publicity:

Groupon has decided to stop running the ads it debuted in the Super Bowl. One ad incorporated the plight of the Tibetans as a comedic device. Oops!

The NFL and Jerry Jones sell Super Bowl tickets to seats that aren't fire marshall-approved. Oops, again!

Dan Snyder, owner of the Washington Redskins, sues a local paper and demands the firing of one of its writers after being the subject of a less than flattering profile. What was that old adage about not picking a fight with someone who buys ink by the barrel?