Not a frequent poster, and this one lean's towards the oddball category, so others will have to judge.
1. I've seen 11 UFOs in my life, two of them were being "chased" by jets out of Patterson AF Base (prob. cause that was the nearest one at the time). At least 2 in retrospect were likely sighting mistakes...things that later were probably airplanes/jets. One I have no idea what it was but I and about 15 others saw this oblong orange ball in the sky float (N to S more or less) for several minutes and then just fade away..visually it appeared about the size of foot ball held at arm's length (but of course much bigger being at a distance). And 1 was definately a plane, though at first it seemed otherwise...I tried very hard to get it to abduct me (I was 17 and stupid) trying to wave it down as its lights swept across the pasture where I was camping with a friend....but it was just a low flying cargo plane. I was disappointed and my friend relieved.
2. Older and wiser I am now inclined to regard most supposed UFO encounters as being of spiritually unwholesome origin. I don't know this...but suspect that it is an accurate ascessment.
3. I don't see the discussion of alien life as necessarily foolish, though it can be. At heart it is a theological question, "What is man?" How we address the question of potential material sentiant life other than our own has a lot to say about who and what we understand ourselves to be.
4. The article by Fr. John Romanides was very interesting, but it raises the question if there is other intellegent life out there which like us is called to be divinized, then can they join the Church? Could an ET ever be a priest or a Bishop?
5. I would have to also wonder what spiritual structures/bodies/teachings would they have prior to meeting us?
6. While I have serious doubts of other intellegent life out there, though I'm more open to lesser types of life, I sometimes wonder if man could eventually tinker up other sentient life forms out of creatures we have with us already (monkeys, apes, dogs, parrots, raccons, etc.). If so what does that mean about them and us and the Church? Could they join, be baptized, commune, enter holy orders, etc? Would they not be essentially "aliens" as Fr. John described them, except they are from here, not out there?
Would polyphonic singing by a choir of sentient parrots be less liturgically problematic for them than it is for some human Orthodox?
I know it sounds silly on the surface, but whole question, once past the silliness, forces you to think about some very serioius theology concerning Orthodox anthropology and man's person and place in the univers.