yeah, its a popular way to mask the odor of larger quantities and if the person who bagged it up knew anything about weed at all [which he probably did, seeing as how he took the time to use the sheets] he would have put in a bag then the dryer sheets in another bag surrounding the weed. However plastic is semi-permeable so if it was stored like that for a long time the weed might pick up the scent, i wouldnt be to worried about it though.