Q is right. You can easily find out there are things flying around which arent man made. Yet people still either dont believe or start making up 'omgpleiadeianangelsinterdimesionalWTFBBQshit'.
It took me a few years of watching skies and side research to figure out chem trails. Info is out there for reasonable people.
I dont think govt should release anything about UFOs. Just a basic 'some things not of this earth' will do for now.