Here is a link re: 'criticism/feedback' regarding some of Dr. Greer's statements:
LINK:
http://www.exopolitics.org/Exo-Comment-44.htm;
AND A SNIP:
..."Also, Greer regularly refers to the Military Abductions (MILABs) phenomenon offered by Dr Helmut Lammer to support his thesis that all alleged abuses attributed to extraterrestrials can be ascribed to MILABs imitating extraterrestrials or to individuals projecting psychological traumas onto benign extraterrestrial visitors. This is a distortion of the evidence provided by Dr Lammer who does not exclude the possibility that extraterrestrials are violating human rights during the abduction phenomenon, only that the military is attempting to replicate extraterrestrial methods and violating human rights in the process."
"Furthermore, Greer does not refer to the extensive research of those such as Zecharia Sitchin, Dr Arthur Horn, William Bramley, Jim Marrs, and others who have examined archeological records and argued that humanity has been seeded by extraterrestrial groups who have violently competed among themselves for control of the Earth. Indeed, these sources point to a long historical presence where humanity has been used as an exploitable resource by some extraterrestrial groups whose motivations and activities are certainly questionable when it comes to the question of human rights violations."
"Finally, in addition to dismissing the data on different categories of researchers documenting extraterrestrial violations of human rights in the modern and ancient era, Greer dismisses the testimonies of a great number of alleged contactees describing the nefarious activities of some contemporary extraterrestrial visitors. Contactees such as Howard Menger, Enrique Castillo Rincon, Eduard "Billy" Meier, "Prof Hernandez", Brian Scott, and many others whose testimonies have been documented and investigated by competent researchers."