The abduction phenomena is more of a spiritual attack than a physical one. The beings people are seeing in those abductions are very real only they are nonphysical. This is another one of those circumstances where people claimed to call upon Jesus and the whole experience went away. In most cases, the people who have experienced abductions brought it upon themselves even if they didn't know they were doing. Mind altering drugs, occult practices, yoga, homosexual behavior, New Age practices, mind techniques (The Napoleon Hill stuff), alcohol, channeling Ouija Boards, etc. can bring about the possible situation where one is "abducted". It usually occurs at night because people are sleep and DMT levels go up in the brain when the mind goes into certain states and these beings from the spirit realm have greater access through that state, but people have experienced the same phenomenon through taking LSD or Peyote. Humanity, including Christians, perceptions of demons is messed up. Christians forgot that the Bible pretty much implies that Satan and his minions are in the Second Heaven (outer space) in another dimension. They took advantage of this and now masquerade as "aliens from another planet". Demons are much more intelligent and scientific than we gave them credit for. In fact, they're much more intelligent than man ever could be.
Damn, man, I gotta keep asking questions because you are dropping knowledge on things I could never get answers to. Can you talk more on how people could unconsciously call upon abductions? You said alcohol and yoga, and what are new age practices? Meditation?
And why do most abductees claim to have medical experiments conducted on them and some claim that military personnel are there with them?