In the words of Cdr. David Fravor (a pilot on record), whatever these things are, they are beyond just being "unidentified."
Well, I think you get me, but to say it clearly: I don’t mean they are all simply identified as conventional airplanes without transponders. There’s a lot of stuff out there that we don’t know about. But “aliens from worlds thousands of light-years away” is not the presumption that any reasonable person would jump to armed with just the facts rather than a lifetime of Hollywood bulls—t.