so for a while the grocery store was being extremely annoying with their theft detection -- basically, if you put your own reusable grocery bag in the bagging area, they'd be like HEY YOU LITTLE THIEVING SHIT, STOP IT, and call over the attendant to verify you didn't try to steal anything. combined with the city's mandate to bring your own bags, it made self-checkout a trying experience. but the last couple times, not a peep!
