I find it absurd(and a little frightening) for anyone to think the government is incapable of concealing such info regarding ETs or UFOs, or at least waging an effective disinfo campaign against them. I mean, we've seen countless artifacts in painting and sculpture, as well as in "myth," that date back thousands of years describing these beings. There have been numerous credible individuals who believe the earth must have been, or is being, visited by alien life, we have regular sightings and claims, numbering in the millions per year worldwide. And yet, we dismiss it all as "mass hysteria" or some other "mythological" rubbish.
How can anyone look into that night sky, that universe, and say we know it all and "We are alone"?! Is this species ego-centrism or what?
I think the most fundamental problem is rooted in monotheism. Don't get me wrong, I very much believe in The First Source & Center, the one & only Uncaused, The Universal Father or God, if you will, but I believe we were babel-factored long ago and thus our true history obscured. It seems we're now on the brink of actually discovering our true heritage and place in the universe which will enable us to become cosmic citizens. Right now though, we're still going through "species adolescence." Fantasy? Perhaps.
Some of you may've seen this, but I think it appropriate:
http://www.neilfreer.com/index10.htm