FairWarning: Each year, more than 67,000 U.S. workers and do-it-yourselfers suffer blade contact injuries, according to government estimates, including more than 33,000 injuries treated in emergency rooms and 4,000 amputations.

FairWarning: No criminal charges will be filed against billboard giant Lamar Advertising Co. despite evidence that company workers in Tallahassee over at least seven years secretly chopped down or poisoned trees to provide clearer views of its roadside signs.

FairWarning: The LipoTron, heavily promoted in Florida for fat reduction, has never been cleared or approved by the U.S. Food and Drug Administration, which would make it illegal under federal law to sell or promote it for weight loss.

FairWarning: As long as there have been billboards, trees have been getting in the way. And billboard companies have been removing them — sometimes legally, sometimes not.

FairWarning: Billboard companies are moving aggressively to plant digital signs along U.S. highways and city streets. But debate persists on whether the eye-grabbing displays, which typically change messages every six to eight seconds, pose a risk to traffic safety.