...I would guess that the land company has no idea about it at all but you can see by some of the trash down there people have been going there for at least 30 years
It sounded very much like you just showed up and began shooting. You never mentioned anything at all regarding getting permission from the landowner until you blasted me for assuming you did that.
I suspect none of us have any problem with shooting outside, for free, but we simply never had the information from you that you actually got permission.
Please re-read your post above and see how it was easy for us to jump to that conclusion.