Police in Granite Shoals, Texas, decided to have a little fun with their Facebook page, sharing a fake post about methamphetamine laced with the Ebola virus as a joke. However, it was a joke that nonetheless achieved real crime-fighting results.

“If you have recently purchased meth or heroin in Central Texas, please take it to the local police or sheriff department so it can be screened with a special device,” the post said on the department’s official Facebook page. “DO NOT use it until it has been properly checked for possible Ebola contamination! Contact any Granite Shoals PD officer for testing.”

The fake post even led to a bust; one woman turned her meth over to the cops and was subsequently arrested for possessing under a gram of a controlled substance.

However, the humorous post proved controversial to many who read about it. Some commenters found it funny, while others felt the cops were either making light of addiction or had been too dishonest. Indeed, there’s a strong case to be made that the police used entrapment to arrest the woman who handed over her drugs, but that issue has yet to come up. What’s certain is this: police use Facebook more than ever to snoop on suspects (or lure them out), and they’re not likely to stop anytime soon.