Here in "Ahia" (Ohio to you out-of-staters), folks tend to use the fire pits and campsites along our and national-forest trails as party zones, especially during hunting season. I have found everything from MRE containers (very common) to Bud Lite cans to diapers to (choke) used condoms around or thrown into the fire pits.
I try to pack out as much as I can, but condoms and used hypodermic needles (yes, no kidding) are just a bit beyond me. Do folks think that the fire will consume an aluminum food wrapper without sending aluminum vapor into the air around them?
And what is it about Bud Lite that makes it the Breakfast of Champion litterers the world over.
The one that sends shivers up my spine is the plethora of spent shotgun shells, however. National forests have an anything goes, "multi-use" policy, but these folks are not supposed to be shooting on or near the backpacking trails. I have a large collection of these. I keep them to remind me why I need to keep yelling "hiker on the trail" as I round blind curves at Wildcat Hollow, Ohio's "most popular backpacking trail" according to B@ckp@cker magazine (censoring out the work in questionable taste). ;-D