The recreational drug thing is not something new, in the late 1990's a profiled guy coming to speak at a convention (linux convention ?) got his laptop vacuum a

The recreational drug thing is not something new, in the late 1990's a profiled guy coming to speak at a convention (linux convention ?) got his laptop vacuum and lab analyzed, results got back that at some point this 7 years old laptop had been in a place where there was marijuana according to the trace amount found. The guy got sent back. He had stopped smoking marijuana 4 or 5 years earlier.