This Florida Gas Station owner had to do the unthinkable and actually post a sign in his convenience store asking his customers not to warm urine in the microwave.
Parul Patel owns a BP Gas Station and On The Fly Convenience store in Jacksonville, FL which just happens to be walking distance from two drug testing labs. Patel told First Coast News people just walk in off the street, microwave their urine containers, and walk out. He said he had to post the sign after one woman became aggressive when asked not to warm her urine. She asked to see that in writing so Patel put it in writing on a sign!
Source: CBS Local News, First Coast News