In "The Demon-Haunted World" astronomer Carl Sagan wrote about the theory that
the alien abduction experience is remarkably similar to tales of demon abduction common
throughout history. "...most of the central elements of the alien abduction account are
present, including sexually obsessive non-humans who live in the sky, walk through walls,
communicate telepathically, and perform breeding on the human species. Unless we believe
that demons really exist, how can we understand so strange a belief system, embraced by the whole Western world (including those considered the wisest among us), reinforced by personal experience in every generation, and taught by Church and State? Is there any real alternative besides a shared delusion based on common brain wiring and chemistry?"
Gee Carl is that the best you can come up with?
You'll accept demons as an explanation but can't wrap your mind around the idea of extraterrestrials actually being here on Earth? 
I wonder if he ever thought WHY reports of alien abduction are similar to Succubi etc. Perhaps because they have similar if not the same sources. Our ancestors wouldn't have understood high tech stuff. They still relied on superstitions and assumptions.All this shows is how out of touch with reality this guy could be. What he did is substitute one for another. Now I want an explanation where demons etc. come from. But Sagan conviently leaves that part out.
I'd accept ETs existing alot quicker than anything demonic. There's far more evidence for them.And no dilusion is going to manifest itself in the such closely similar ways with as may people that have reported abductions. Especially over the period of time that reports have come in.
So in summation Mr. Sagan I thoroughly took apart you "evidence."
And I don't even have a science degree. 
Exhibit B: http://en.wikipedia.org/wiki/David_Michael_Jacobs
David Michael Jacobs is an American historian and recently retired Associate Professor of History at Temple University, specializing in twentieth century American history and culture. He is well known in the field of Ufology for his research into alleged alien abductions and UFOs.
Jacobs obtained his Ph.D. from the University of Wisconsin-Madison in 1973, in the field of intellectual history. He wrote his dissertation on the controversy over unidentified flying objects in America. A revised edition of his dissertation was published as The UFO Controversy in America by Indiana University Press in 1975.
As a faculty member of the Department of History at Temple University, Jacobs specialized in Grey alien geography and history of 20th-century American popular culture. He stated that his current research interests "involve a delineation of the role of anomalous experiences in personal and cultural life." For over 25 years Jacobs has taught a course on "UFOs in American Society
It stands to reason that with over a quarter century in the study of Ufology that if Dr. Jacobs had come across evidence that led him to believe abduction reports were not true then he would have stopped and moved on to something else. But the fact that he's been at it this long strongly indicates there's something to it.
How many years of study do the skeptics put in before they make they're assessments?
Exhibit C:
The belief by skeptics that abduction reports are made to get attention.
Ok show me ONE person who is so desperate for attention and can't get it any other way that they'd make up something like this. There are so many easier and better ways to get attention that don't result in ridicule from others.
