My kids have asked me about it, about what I think of these things. I don't want to make judgments about other people's integrity or honesty. If someone claims to have seen something, then maybe he actually did. Its the reports that I can make observations about, if anything. So this is how I've handled it, using Star Trek and Star Wars as examples, which my kids can relate to well enough (I also have a few episodes of the weekly series "Lost in Space" so they get the idea of flying saucers too):
At one time it seemed that all the "sightings" coincided with the common "expectations", or the common wisdom about space travel. People used to see flying saucers when the common idea was that space travel was accomplished by using such vehicles as appeared to be flying saucers. As NASA began travel in space, even going to the moon, then it wasn't so far-fetched to see something other than a flying saucer. It wouldn't be a copy of the Apollo crafts or of the Shuttles, but sightings still reflected the current "wisdom" of space travel somehow.
What people would witness would be within the range of what you'd expect would be seen according to the common concept of what space travel would consist of, or at least it would reflect it. I guess the thing is that others just wouldn't believe you saw something from outer space unless it fulfilled everyone's idea of what outer space would send us. So I can see that these sightings would be interpreted as wishful thinking, or as some unfulfilled or unfulfillable need in people.
I get a kick out of the Star Trek/ Star Wars ideas of aliens. No matter what they create, the "aliens" are all somehow in the image of man, either physically, spiritually, sensually, or some other way. Every time there is some extreme extension of some kind, but always as a clear product of the human imagination. I just can't help but see this same thing in the sightings of UFO's.
What people actually see, though, remains unexplained. And that's what the "U" stands for: unidentified. The fact that they fly seems to be obvious. Whether they're objects or not also remains unsure. Of the three, the "U", the "F", and the "O", none are a sure thing. And yet even if it was nothing strange to our environment, it would still be an UFO, I guess. Where I get stuck is when people go from the "U" to an "I": from unidentified to identified. For that we need explanation or proof. I can't account for all that people see or claim they see, but I expect something that does not accommodate to our sci-fi ideas if it really is a visitation from a distant planet.
The idea I wanted to convey to my children was that they shouldn't be easily taken in by so-called "proofs", especially in our day. At the same time, it wasn't right to condemn people for seeing something that went against your beliefs. I would be sure to say to them that the Son of God came to our planet that we might have life in His name, and that therefore Earth is significant to God. We need to be careful not to say more than we have a right to say, for there are possibilities that we haven't even begun to imagine yet. Then I would tell them that it requires an exhaustive search of space to declare that there is no life out there, but only one chance encounter to prove that there is life out there. As easy as a chance encounter seems in comparison to exhaustive searching, yet that chance encounter is very hard to prove. Try to prove that you ran into so-and-so by chance, so that we are all convinced that you did, and you only begin to see the problems involved. In this way you can see that only sighting UFO's, or a claim to have been captured by aliens for a time, is only the merest beginning of what would be called proof. It doesn't stop there, and we shouldn't stop there either when we try to make up our minds about whether UFO's are visitors from other planets.
UFO's are an intrinsic by-product of our age, and we should expect such claims to be made, whether there actually are visitors from other planets or not. And people are going to be convinced they saw or experienced something that maybe never was there or never happened. The explanation in God's Word seems to make the Earth the centrepiece of the whole creation, and I am not going to doubt that. If there are aliens out there, then they're coming to us like the Magi came to Bethlehem, I would think, not like Star Wars, Star Trek, Flash Gordon, or countless others portray it.