[Gamer930]

Once when walking out of our School Library I got beeped at. One of the Staff walked up to me and asked "Do you have a cell phone on you?" (we were aloud to have them on us as long as they weren't on). I told her yes I did (I never go anywhere without it). Upon further investigation they had a problem with the alarms not picking up stolen books if they were really hidden in your backpack so they turned up the sensitivity and the cell phones started tripping it off.

This seems wierd because it didn't beep at me on the way in but it did on the way out and you have to walk through the same door and same detectors.