Questioned at the yard when dropping off Prepared Steel

While unloading some prepared steel I had a few cookie, popcorn and other metal tins (the kinds that have lids) full of screws and nails the guy asks if I had any soup or food cans in with the load. I tell him my food cans go in with the shred and I just use these as they have no paper wrapper, held dry food only and have a lid so I can keep the small sharp items together. I guess the buyer must got a load with a lot of food cans and was not happy! I did get $73 a net ton for the load, so better than a poke in the eye!