if he didn't stop to look at it, he didn't see it, unless it's the only plant in the garden, they can be decieving to look at, plus how many meter readers have seen a real live MJ plant? you'd be suprised, most people don't know what MJ looks like. Plus if he saw it, he would've come back to steal it or have already called the po po. Don't worry, move it somewhere else if you can, otherwise take your chance.