I completely agree that it could have been handled much better than what it was. The reason it is a concern for stores when their checkpoint system goes off when someone is entering the store, is that it is a "scam" used by some professional shoplifters.Quite a few years ago my wife and I walked "into" a supermarket (don't remember the name and it's no longer there). Something in her purse caused the alarm sensor to go off. We were approached immediately and told that they would have to check us and her purse. Seriously? I told the woman, "You mean we are suspected of shoplifting "into" the store? I told her she was not going to search either of us and we were going to walk out. I said "if you intend to call the Sheriff's Office let me know and I will wait outside, otherwise we're leaving and I will never darken your doors again. We left and never went back.
This could have been handled differently. Like saying "excuse me but have you maybe brought something in from another store that might have set our alarm off, or maybe an implanted medical device?
In my city, I can't go into the Harley Davidson dealer without setting off the door alarm. I have a stent from a blocked artery that sets it off.
The way it works is that a shoplifter will keep an item on their person that they know will activate the system when they enter the store, so that when the system activates upon them leaving the store, the employee will not give it a second thought.