I'm not sure the sort of Krampus-esque peter pan story is real or not, I have a damned hard time tracking it down, and I can usually find the darker origins of fairy tales pretty quickly. I've seen a jpeg on facebook alluding to it, that's it, so it may be someone's creative thinking. I think it was more someone taking a fun twisted look at the Disney version of Peter Pan. Peter Pan was a turn of the century play, and is supposed to be inspired by the story of Peter the Wild Child in the 18th century. 
[url=http://en.wikipedia.org/wiki/Peter_the_Wild_Boy]
[url=http://www.bbc.co.uk/news/magazine-14215171]
[url=http://neverpedia.com/]

OK I finally found a free copy online of JM Barrie's Peter Pan play, the original "Peter Pan". I haven't read it and don't have time but there it is: [url=http://www.literatureproject.com/peter-pan/]