Bradford Library books used to set off the door alarms in Curry's and Staple's.
Used to end up going to the library after the stores, or avoiding altogether.
I had a problem with door alarms, following surgery on the knee. I'd four metal rods running down the best part of one leg. The rods stopped the knee moving, but also seemed to generate just enough static to set the alarm off.
New manager at the soon to close Wilkinson's wanted security to search me on the spot. To try and ease her mind I put the leg only through the alarm, and off it went. The alarm, not the leg. She remained unconvinced because I was "walking funny". Again she demanded that security stop and search me, there in front of her. Security meanwhile was bent double on the nearest checkout, in tears of laughter.
He knew what was causing the problem, as he'd stopped me more than once.
The manager was still suspicious, but short of dropping the trousers, there was no way of showing, in full, what was actually on the leg.