Are those necessarily mutually exclusive? Plenty of campers in this category manage to LNT. The sort of stuff I'm talking about is driven by being an asshole, not by having slipped through the cracks of society - if anything, IME those genuinely down on their luck do better with trash and it's the cheap vacation people who are really bad about it.

That aside, that kind of behavior eliminates this sort of resource for everybody, including those who need it most. A sibling comment mentions a camp getting shut down by bad behavior of a few. Letting trash accumulate to the point where a camping spot is physically unusable is in the same category of behavior. If you're concerned about those who slip through the cracks of society, you should be concerned about commons-torching abuses that cut off their remaining options.

I'm all for the right of people with nowhere else to go to camp on public land for as long as they want, but it is ridiculous to pretend that we don't all have the responsibility to be responsible stewards of the land. The suggestion that it is okay for people who are forced to camp to litter and destroy our public lands only gives ammunition to those who want to prevent such camping all together.