https://corporate.findlaw.com/litigation-disputes/the-endangered-species-act.html
"ESA §9 makes it unlawful for anyone to "take" a listed animal, and this includes significantly modifying its habitat. This applies to private parties and private land; a landowner is not allowed to harm an endangered animal or its habitat on his property."
"ESA §9 prohibits everyone, private person and federal agency alike, from "taking" endangered wildlife. The regulations extend this to threatened animals (see e.g. , 50 C.F.R. §§17.31, 17.21). "Take" includes "harming" a listed species, and "harm" is defined by FWS regulation to include habitat alteration:
Harm in the definition of "take" in the Act means an act which actually kills or injures wildlife. Such act may include significant habitat modification or degradation where it actually kills or injures wildlife by significantly impacting essential behavioral patterns, including breeding, feeding, or sheltering"
The key words here are "LISTED ANIMAL". My posts above are in regard to Sasquatch as a listed animal and the economic fallout if Sasquatch ever became one. The potential financial damage is why people work to make sure Bigfoot NEVER becomes a listed animal- Homo or not. Because if it ever did then even private timber/mining land revenues would be is serious jeopardy. I know because I research these kinds things to make sure my arguments have solid footing. I don't just blast this kind of stuff off the top of me head just to have something to say or to make trouble.
So the question becomes an ethical/economic one: If a timberland owner has Sasquatches living in their timber do they tell someone? Or shoot them so that no one knows? Or strike up a small controlled wildfire to drive them out? How much electronic surveillance would a landowner utilize to make sure the creatures aren't around? Are there images and videos that we'll never know about?