I have worked in the same retail store for the last 11 years, our security system was broken for the longest time. Everytime somebody make a copy on the copier that we kept by the door, the thing would go off. For the longest time, we just told customers if it went off just keep walking. The funny thing was that I was in another retail store, and they have the same system, I bought something and they forgot to deactivate it, the thing went off and I kept walking. Some guy came running after me yelling at me.