The Murky Legal World of the DNA You Leave Behind at Restaurants

"Or think of it this way, says University of California Davis School of Law professor Elizabeth Joh, who’s proposed laws against DNA theft: Do you have anything to hide? Then this is an issue you should start thinking about.

“I don’t know that every single person at the present moment needs to worry, but if there’s any possibility you’ve committed a crime that would be worth police investigating your DNA, or if you’re related to someone who may be the subject of an investigation, if you’re a famous person, if you’ve done something that could make you the target of revenge or blackmail, or if you have a secret of some sort that someone could exploit, you might be worried,” she says."