I despise cluttered firing ranges. For many years, I used a public range out in the country near Beale AFB. Each time, before leaving, I would police up the brass in my bench area and the ones next to me. I would also pick up some of the trash targets that they used and some of the trash laying around. Because I reload, I would take the brass home and what trash I found would go into the trash barrels at the range. I would take a couple evenings sorting through the brass, discarding the steel and aluminum. Those that were headstamped with familiar cartridges were set to clean and the others were put into a 5 gal bucket. I have several of those buckets that made the move with me. I suppose I should go through them just to find out what is in there.
No such thing as a stupid question. What is stupid is not asking it.