First, it would not explain the size at all. the condition in no way makes people grow to 8-12 feet tall. Also if they were just humans, they would exibit the characteristics of humans. Mostly, the children would be very curious and would be seen checking out humans much more often than is reported. The cold would lead them to take shelter where they would be discovered more often. I don't think hiding would be instictive to them. Tool and shelter making would be more important. You would also get some "bad eggs" who think "screw this, I'm going to town".
See, this is where I think you are wrong. The height I cannot comment on, but many of the sasquatch sightings I have read up on, the height was usually estimated between 6 and 8 feet, and like other posters said, it is hard to judge height.
As for the "go to town/hiding" comment. Well, (out here), there are native tales of conflict with these "hairy mountain people". If there was indeed violence and conflict between them in days long since past, it would make sense that the Sasquatches developed a good fear of us "normal" humans - a fear that would be taught and passed on from an early age generation after generation.
Well, (again out here), unless you are talking about a ski resort area or one of the few common trails people snowshoe, winter in the mtns out here tends to keep most people down in the cities, etc. High avalanche risk, and dense, steep, mountainous terrain. Unless you are experienced in it, it's hard to move through. And another advantage - again out here - is that winters in the coastal mountains don't get uber cold. Minus 10-20 is the usual lows even at fairly high elevations, but down near sea-level we have winters where snow is rarely seen. Shelter and keeping warm is not hard out here, when one knows what they are doing.
As for the ecological impact of these creatures/food sources... (again, pertaining to the west coast), food is very abundant all months of the year (yes, there is less in the winter, but it's still here if you know where to look). As for the ecological impacts, well, I doubt you would notice the affect of a dozen or two of these Sasquatches amongst the impacts of literally hundreds of black bears and other predators/large game animals. Their affect would be lost amongst the numbers.
And how many people, who are out in the woods, study bones they come across? And how many of them (if they don't do the smart thing and get out of the area of a kill), are actually experienced enough to be able to tell the difference of teeth marks of a bear from a cat, etc. I wonder this. Very few people are experts in this field of study.
Edited by Bavarian Raven, 12 October 2012 - 03:46 PM.