thc doesn't just suddenly appear. he'll get stoned off his hijacked weed, even if he dries it in a microwave. thc 'climbs a slope' as its growing pretty steadily. good that you moved it, cuz odds r that he will be back.
i made the mistake of showing just one guy one of my grows. i pointed out the best plant in the room. a few days later he kicked in my a.c. unit and snagged that one plant. for several hours while i was at work (after dark) i had a 1000w hps and a 400w mh on a sun circle shining out the bedroom window like a friggin beacon of destruction. gawd. i immediately chopped it all down and moved a couple couches into the room. 3 weeks later the same guy came back, again kicking in my a.c. unit. He found only couches. i let that one slide, blaming it on myself. lesson learned, and thankfully i didn't end up in jail.