For example, there was this crew back in the early seventies that was filming a Bigfoot movie. A few years later, after the feature film was forgotten, the home movie surfaced as 'proof' that Bigfoot exists. I also used to listen to a late night talk show hosted by Frank Sontag. He rattled off a bunch of scary statistics about several species of alien visitors, abduction deals with the U.S. government, various motives for visitation, etc. At that time, since it was on the radio, I thought it must be true and it scared the crap out of me.
Yellow journalism is still alive and well.
When I first announced that I was working on this topic, two people came forward with UFO photos. If I can't trust you, I might as well have committed suicide when I was in diapers. I agreed not to divulge their identities. After the photos were scanned, the prints were sent to the Vatican and the negatives were hidden. A disk shaped object passed by at tremendous speed, not even making a sound.