Is it easy to steal clothes with ony the paper tags on them?
Loss prevention personnel are well aware that many shoplifters think that a fitting room is a safe place to cut off tags and conceal garments. Therefore, they monitor this all the time. If someone is seen, either in person or on camera, enter the fitting room with more items than they take out, that is universally accepted as "probable cause" to stop and detain the person, using reasonable force (including handcuffs)