I am surprised no one has mentioned Gov. mind control experiments.
Its not the Aliens doing this at all, its us. The people have been brainwashed to believe it was the Aliens. Real human beings wouldn't do that kind of stuff...hybrid DNA experiments.....forced abortions...and it certainly wouldn't be 'our' Gov. doing this.

Disinformation is a powerful tool. Lie to and manipulate the people and get them to believe the Aliens did it.

Advanced technology and noble behavior do not always go together. During the 1600s Europeans used their technology to enslave natives of western Africa. Now that was a form of alien abduction.

Your theory has several holes in it. Let's look at the monkey analogy. First off, we keep those monkeys for several months/years. After which, we dissect them so that we can have complete analysis. Not only do we go to such lengths, but usually the scientists doing so have upwards of a dozen subjects which they are monitoring.

Second, I can understand the concept of aliens torturing human subjects just to test the depths of their abilities to withstand the torture. We've done that ourselves, I believe Dr. Mengele was famous for this. However, once again the to truly understand how much torture a human can take, it must end in his death. To think of the raw amounts of "subjects" that Mengele went through is horrifying, so once again, alien scientists would need more than a couple of subjects for a few hours. I'm not assuming that an alien race would be more "humane" than we humans at all, quite frankly our own version of our humanity is kind of idealistic to begin with, we really are just animals.

Third, I don't think you have a concept of how big space really is, let alone the amounts of energy required to move between star systems. At 99% of light speed it would take 8 1/2 years to reach the nearest star (round trip). This would require about the same amount of energy as our sun puts off over the course of a century. All that energy used, and odds are, there are no planets circling that star. The nearest star that we are 100% sure has a planet orbiting it (not even inhabitable, just orbiting) is approximately 26 light years away, requiring a 50+ year mission. These are broad amounts of energy and research required to pull off a short subject test. Basically the equivalent to building a nuclear reactor to see if a ten watt bulb has burnt out.

Now, assuming that their society had to evolve to a stage to do this kind of travel, it is safe to assume that these "alien scientists" had to unravel the secrets of the universe that are required to do so. We, as a culture are also attempting to do this same thing, however, we don't devote near as much of our scientific research into finding these solutions as we do to finding out about the physiology of all known beings (plant and animal life). Ergo, it is reasonable to assume that other life forces in the universe would also want to find an understanding of such things as well. More than likely, as with humans, an understanding of how to preserve their own lives would take precedent over space travel. Much like we consider eating (preserving our own lives) more important than vacations (travel).

So, to assume that alien life would have medical/scientific hardware much more elaborate and useful than we humans is not out of the realm of possibility. It actually seems quite reasonable. It would also seem to be a logical extension that whatever technology an alien being - that has the ability to travel across vast distances of space - would almost seem like it was straight out of science fiction. It might even seem miraculous or magical to our undeveloped science.

Well ...
as soon as we find a way to travel faster than light speed without destroying what we are transporting ... or a wormhole and a way to teleport organisms through it and back again ...
I'll consider extraterrestial visitations possible.

until then ... its mostly dellusion, illusion and hysteria pulled out of a hat.

psychosis is a seperate problem

Logically considering, why would they need so many samples? With all the UFO hysteria and so on and claiming how "thousands" have been abducted and put on a surgery table and examined .. it gets doubtful really, when a technologically superior creatures keep abducting one after another to do "experiments" on them.

Another logical conclusion is, that what's the point really? Let's assume that abductions happen.

If you want to take samples from a population, you would really not need hundred-thousands of labrats..I would say a maximum of 50-100 people would be more than enough.

If they are technologically superior, they know genetic engineering better than humans, they can "clone" , replicate or even genetically modify DNA if that's what they are after.
If that's not what they are after, then I have no idea, but I doubt it would be just to torture and scare the living sh.t out of a bunch of people. That doesn't compute.
Waste of time, waste of resources and pointless.

Well, I'd like to think that a society advanced far enough to travel across vast regions of space would also be advanced enough medically to be able to use "tri-corder" type technology. I mean we are advanced enough to use MRIs, Xrays, and CAT scans, not very invasive and tell us a lot. So if we, a backwards planet bound civilization, have advances in technology that tell us about the inner workings of organic bodies, it makes no sense to assume that "visitors" wouldn't also be advanced beyond our capabilities in this area as well.

So once again, it seems very unlikely that these types of invasive techniques would be necessary. It would seem more likely that these abductees got liquored up and buggered by a bear.