back in the day I worked for an outsourcer, we had a contract at a secure site basically installing some new kit and pc's. The site we worked on also happened to do some rather scary nasty stuff for the mod so a lot of areas where out of bounds and security was very tight indeed, high fences, cameras everywhere only one way in or out, badge access on every door, the usual.
Anyway, step forward new guy, just hired and sent to our site, new guy decided it would be a good idea to try and smuggle his mate on site, at 11pm to go raiding the storeroom of new laptops, back when laptop cost around 6k a pop, security had a field day, of course as soon as he used his pass on the first door out of hours their consoles lit up, they video'd him and his mates every move from the second he entered the carpark and grabbed him as he left arms laden with boxed laptops, he came up with a lame excuse about taking them to install stuff on, of course he was fired. no idea what actually happened to him or his mate, the whole incident was quietly swept under the carpet, amazingly we kept the contract.
another funny thing on that site, they had a cyanide alarm, and chemical suits outside, a nice sign saying in case of alarm put on a suit, there where about 6 of us in the room, and only 2 suits, I often wondered what would happen if the alarm ever sounded.