Even then that guard isn't going to try to stop people, even obvious offenders. They're there to get a good look at you on the way out, and spook the low-effor

Even then that guard isn't going to try to stop people, even obvious offenders. They're there to get a good look at you on the way out, and spook the low-effort thieves who may chicken out. Workers comp for 3-5 stitches and a day or two off of work would cost way more than just letting someone walk out with a couple Nintendo games or some headphones.