Ah frito, such issues can never be resolved beyond a shadow of a doubt. For all I know, molemen might exist, I can never say with 100% certainty that they do not. For practical purposes, I hope that nobody invests time and money into determining whether or not molemen exist, because honestly, within the context of modern biology, it seems extremely unlikely that such a creature would exist, I mean, what would be it's evolutionary heritage
The difference to me, between Bigfoot and molemen, is simply that molemen have not caught on as well in the pop culture perspective. I don't know how the legend of Bigfoot started out, whether it was complete hoax, or simple misidentification of bears, or what have you. In the context of modern biology and evolutionary history, I find it difficult to believe that a creature such as Bigfoot exists, given that great apes have no history in North America. I've also heard something like, a creature of Bigfoot's proportions would have to maintain a much larger breeding population than is suggested by the frequency of sightings. To me, the sad fact is that a lot of serious and even talented people have invested their time, effort, and money into evaluating the existence of Bigfoot when I don't think it has much of a leg up on the existence of molemen.