Worst place for thieving i ever worked was Walthamstow bus garage, this about 18 years ago (London Transport spent a couple Million refurbishing it then sold the site off for housing less than 2 years later)
We rewired the whole place, it was still Vir & rewirable dist boards.
We had 2 sea containers inside the garage as stuff kept going missing. We had 3 flying carpets (scissor lifts) & they even nicked the batteries out of one so had to get a compound put up round everything. All that was outside this was a lead going to a socket. One night they nicked the plug, next night after it was replaced, they nicked the plug and the whole lead.
The skip was never changed in the 6 month contract, there was a continuous stream of bus drivers, mechanics etc taking anything & everything out, little bits of plasterboard, as small as foot square, any old bit of timber, studwork etc. I watched one driver unscrewing loads of plasterboard screws from a stud and putting them in his pocket.
The car park was full of hand painted old bangers in red or yellow or grey which was the bus colours then, but the guys i got to know all had new cars at home their other halfs drove.