I know on several attempts neighbors in the area tried to get it shut down, just because it was a shooting rage, outside, in the neighborhood. They sited noise and safety, but the DNR always came back with, well its legal though, so sorry.
I have herd the "rumors" of the pit shutting down because of the "litter problem" since before I started going up their. Yet it has never shut down. I have never herd any LEO (including DNR ever mention it). But hey just in case I fully agree with Stainless! ALWAYS POLICE YOURSELVES, AND OTHERS. If you are their and see someone else about to leave their trash, make sure you stop them and let them know how important it is for them to make sure they ALWAYS clean up after themselves, and even suggest they pick up some extra stuff while they are here anyways, even go with them to help.
And this is how I handle it. During every seize-fire, I go and set up my new targets, but do NOT pick up my old ones (yet), I just pick up trash on my way back to the firing line, and drop it off in the cans. I wait until I am done shooting before I get "my" trash, and by this time I have probably had 10-15 seize fires, to pick up some other garbage.
On another note, please be extra polite to the man that is up their everyday picking up unwanted brass, he is always polite. Willing to give advise, but only if asked. Overly willing to help if you are helping someone to shoot for the first time, to help teach (like if you are taking more than one person to shoot for the first time, this is a great help). He is also the one whom purchased with his own money those trash cans. I never asked if he personally empties them somewhere or if they have trash up pick their, but even if they do have trash pick up their, he has to go and put them out, and put them back. And people keep steeling them, and he keeps replacing them. He is retired, and his only current income, is reloading that unwanted brass, or scrapping the bad unwanted brass, and it has been working for him. He is a good guy.
And on yet another topic, when you go, pull to the side of the road right before you get their, right at the entrance/exit, get out of your car and inspect the ground. The neighbors have been known to put 2X4's with nails in them in the entrance and in the lot, for YOUR TIRES, they have also used sharpened Jacks (like jumping jacks but no fun). Because they hate the pit so much.
So moral of the story, pick up the pit, make sure others do to (some people honestly just don't know), be nice to the guy picking up the unwanted brass, inspect the lot/entrance, be safe, and HAVE FUN!