Hope your experiences can illuminate my learning.
1. I see folks with take-out food packages tossed in the trash; some is organic, some plastics, little metal or glass. How would that get prepared for composting? It's yucky as it comes in.
2. If things are slow where I work, a brown paper bag with take-out food packages would be air dried rather than composted; slight amounts of food material stuck to the dried brown paper would be overlooked.
3. Recently I found a neglected container full of peach pits; the rats had been in there feeding but also chewing up the aluminum foil that had been in the mix. I cut myself some slack on the ALF which I would not have done if it were glass shards; after removing some of the foil, I let some go with the pits into the organics. Will the farmers be upset?
4. My test for PE film vs. cellophane is the stretch-ability. A lot of plastic cutlery comes in either material but if the material stretches, it's PE film. I'll put thin cellophane in the compost but not thick stuff.