thiefses
A colleague used to work in the software part of an engineering works. She discovered, after she spent a day disposing of a lot of outdated manuals, that all their bins were weighed before heading towards the dump.
Apparently there had been a number of cases where large lumps of copper had been purloined using a bin & retrieve method.
The stupid thing was that these had thousands of pounds worth of precision machining done on them, and so the scrap value was a tiny percentage of their value.