What I see in the Patterson film
Upon viewing a stabilized version of this film, I can see that the Patterson "creature" DOES completely straighten its legs from thigh to ankle when it plants each foot on the ground. I can see it most easily at the very beginning of the film, before it walks behind the downed trees.
I see straight lines (seams) in the costume, and in a late frame showing the back, a straight vertical line (a seam) where the right arm joins the torso.
I also see a white spot at the right knee, and 2 identical spots at the right hip, and it appears to me as if they are somehow connected under the fur. (A "v" shaped ridge in the right leg)
I believe the "creature" in the Patterson/Gimlin 1967 film is a person in a fur suit.
However, I don't know how the footprints found there could have been imprinted into the soil so deeply. (They were what, twice as deep as a 200 pound man would make in the same soil?)
And some of the footprints have dermal ridges (like fingerprints) in them. Dermal ridges are not easily faked.
Are all the people who report seeing a bigfoot lying or mistaken about what they see? No, I think they're seeing SOMETHING. Are all the sightings hoaxes? If they were, it would involve a lot of people with ape suits.
Maybe the BFRO could detect a chronological pattern in the sightings, maybe computer-map them to see if people are staging fake sightings?
Maybe there will have to be laws against shooting a Bigfoot (to avoid shooting a person in a monkey suit), and laws against people wearing monkey suits outdoors, where they could get shot.
Is Bigfoot real? Maybe, but I don't know. The videos, pictures, stories, and sound recordings don't really PROVE anything. There will have to be a body for scientists to examine.