My dump has a sign "no scavenging". Didn't stop me from asking if I could have a Coca Cola merchandiser/reach in cooler. Guy even helped me load it, but said if his boss saw he'd "be in trouble".

Used it as a icebox for drinks out on the patio for BBQ's, then sold it for $100 a few years later, even though it didn't work. Guy didn't care.




So as for enforced...I don't know. I mean what can they do? Just ask you not to salvage scrap. Which to me is stupid, because if people keep throwing metals away, in time we'll be mining the landfills for metals.