I think simonpaul makes a good point. If people believed in faries and Aleister Crowley spoke to greys (http://www.boudillion.com/lam/lam.htm) why could they not be something else besides little green men, Lemurians, or time travelers?
Thanks for the link. It is pretty wild, but very interesting. You can chalk me up as one who suspects that the “greys” phenomena could be manifestation of evil spiritual forces.