The more we look, and as the technology improves the possibility of finding Bigfoot are diminished, it is increasingly becoming a "harder sell" IMO.
I have plenty of thermal and IR experience (military not BF related) and we would get animal signatures all the time. If you are not picking up Bigfoot, then it is not around. Justifying negative results to behavioral change (thermal/IR related)is not reasonable IMO.
I will say right now that I don't believe in Sasquatch, no evidence supports it's existence, but I would really like for it to be true, and that is why I enjoy 'Squatchin.
The more widespread the "sightings" the less likely it exists, I find it disheartening to find reports from all over the country. When it was confined to a narrow Northwest corridor, we could attribute a lack of evidence on it's elusiveness, but with widespread sightings we are watering down the legend.
Now with newer technology, and a surge in popularity, the part of me holding for the wonderful news of this incredibly cool creature's existence is shrinking daily. Sorry for the rant, but if we are net getting thermal, we are simply not seeing them. As I have said before, the standards have changed, and fuzzy pictures, depressions, wood knocking etc. just doesn't hold water, the 1970's are long gone. We have come no farther than Ivan Marx's "Legend of Bigfoot" movie, his stuff is as credible as anything I have seen, and that film is.............well, you know what!