In my job as a Human Resources Manager and Hospital Compliance Officer I spend a lot of time explaining to people about the things they can and can't do. One of the most common complaints I hear as I teach is, "but that's not right." I then usually must spend an inordinate amount of time explaining the differences between what is "right" and what is "legal." The two are often not the same thing at all.
For example, there are laws in every State that forbid the stealing of your car. However, in many States (as we've already seen) the laws provide for the exact opposite in terms of hunting gear left unattended. It may not be right, but that isn't going to get you very far. Rail all you want against it but, unless and until you get your legislators to change the law, there will be no remedy for your loss.
I think you could also find losers and jerks on both sides of the argument. For example, why should a camper be subject to fines if they litter in public wilderness, while at the same time you are allowed to hang a 20+ lb eyesore in a tree and leave it there, possibly indefinitely?
Or why should you be able to lay an exclusive claim (and any reasoned "jury-of-your-peers" is going to agree that it is staking a claim) to hunt in an area of public land, just by leaving some of your personal property in the area (or in multiple areas)?
It's wrong that I should have to lock my home up when I go somewhere. People should know that what is in there is mine, not theirs. However, if on the basis of what's right/wrong I choose not to lock my doors, then I pretty much am asking for my things to be liberated from me.
So too with public land. You should not leave your stuff there, at least not if you want to remain the owner of said stuff. Right, wrong, or indifferent has no bearing on the matter. If you leave it, someone will likely take it and there is often no legal remedy for you.
Also, if you have left your things on public land, others are going to use them and the laws have generally been specifically constructed such that the person occupying "your" stand will have more rights to it than you. Right, wrong, or indifferent has no bearing on the matter.
If you don't like it, get ahold of your legislators and start lobbying for change. Just don't hold your breath in the process.