linking this thread to the pumpkin thread.
If you shoot things that leave organic debris in public areas, what is your policy on cleaning? If the debris are gone in 1 day? 1 week? 1 month? If something that will be eaten?
I think about it like this:
"Trash" is something I consider to be "litter". Paper, wood, metal, plastic, and things that aren't generally considered "biodegradable" in the short term. I don't leave trash behind.
"Garbage" is another matter...but not really. This I consider to be the rest of the spectrum. Biodegradable or not, garbage is garbage. I would not want it strewn about on my own lawn for a variety of reasons, not the least of which is appearance.
If I had my OWN property that I could shoot on, I'd STILL clean it up. At least to some extent, given the loacation. Pick up the pumpkin chunks, scrap up the pumpkin guts, etc. If it were my own property, I'd at least clean it up and move well it off the range into the woods (critters gotta eat, too).
BUT...
Public shooting ranges are not personal private property. Somebody else's private shooting ranges are not your own personal private property. So don't leave garbage lying about any more than you would on your own lawn.
If you wouldn't want to clean it up in your own lawn...then don't even bother making the mess in the first place.