I think it is probably a waste of effort to spend much time debating whether these people actually believe the things they say they do, since there is no method I know of to ever come to any definitive conclusion on the matter. Ultimately, if we're going to participate and hold up our end of the footer/skeptic dance, the successive claims have to be examined the same either way.
If a participating skeptic is fully convinced that the 'footers don't believe their own claims, then the only conclusion to make is that 'footers are entertaining themselves at the expense of the skeptics who expend the energy refuting them. So to continue to participate is to knowingly contribute to their amusement at his own expense. The skeptic loses even if he wins.
I think, another more interesting avenue to explore with these folks, is that there might be something to be inferred about Bigfooters in how they idolize and are enchanted by men with either prestigious or extremely masculine titles, traits or careers.
I believe that in the bigfoot world, the "PhD" or "Special Forces Operator" represents an idolized, unobtainable ideal. And that this is exhibitive of a sort of submissive, self-defeating personality type. Whereas in the skeptic world we don't give very much value to titles alone but instead examine specific claims.
I think this plays out in the NAWAC, where everyday members are under the spell of a certain "former military" spokesman/leader and certain "Wildlife Biologist" spokesman/leader, whose professional-level claims cannot be scrutinized by average, everyday NAWACers since they inherently lack the fortitude/expertise to come to their own conclusions, and would rather have their conclusions dictated to them. It's a very cultish clique, IMO.