Guard the Stool Softener

Ok, this isn’t really law related, but it is technology.  I was at the Walgreens tonight getting some pre-thanksgiving antacids when I observed a door over some of the medications.  When you lift the door for over 5 seconds an alert tells you of the presense of the theft prevention device, and an alarm sounds, presumably to draw attention to you if you are lifting the door frequently to stuff drugs in your jacket.  I had seen such devices on cigarettes before at the grocery store, so the technology was not the surprise, but rather what they chose to guard.  Of the hundreds of products on the Walgreens aisles, the only items protected by this theft deterrent was stool softeners.  Is this the most highly shop lifted product, and if so by whom?  All I can envision is constipated little old ladies stealthily knocking the stool softeners into their handbags with their canes.  Thank goodness Walgreens has put a stop to such rampant crime, to control the price of stool softeners for the rest of us.