I come at this from a different angle. I wasn't aware of the existence of the PGF until about 7-10 years ago, long after my first sighting. The figure in the film looks enough like what I saw to suggest to me very strongly she is exactly what they said she is, no hoax involved.
If I were going to perpetrate a hoax, I would do one thing well, not do one thing only halfway well, then try to do another halfway well to validate the first. In practice, it creates twice as many things that have to stand up to scrutiny and if either fails, it pulls down the house of cards. Nope, in the case of a hoax it is wisest to put all your eggs in one basket and make it a very good basket indeed.
The bottom line is, at this point, all attempts to prove the PGF, tracks, etc have failed on an epic scale. The denialists have failed in every attempt and now resort to special pleading and a lot of juvenile "but but but"-ing. They're pathetic. It's become religion to them. They're too wrapped up in their denial to see that every failure on their part strengthens the perception of validity in the mind of honest skeptics and honest believers alike. And of course, knowers don't need the PGF so how the failed debunking affects them doesn't really need to be discussed. (Besides, the laughter speaks for itself.)
MIB