It happens all the time at the hospital I work at. A couple of months ago, an RN got busted for signing out massive amounts of demerol for a baby. she had been doing it for a while, too. And before that, a doc was busted for drawing morphine out of vials and replacing it with water. Sometimes the drug count in the Omnicell won't match up, and goes unexplained. Diversion will always exist, as long as addiction exists.