Not necessarily every account, but as I said, I don't believe everyone is lying. I believe many of them are reporting what they saw, not conspiring to concoct stories to trick people. Just the sense I've gotten from accounts I've looked at.
There also is evidence, take the mass sightings, such as the phoenix lights, for example which were caught on video by multiple sources. The fact that we know something was up there that night gives more weight to the eye witness testimonies. Most people don't have much to gain by reporting a sighting, particularly those with a public reputation, like Jimmy Carter. Edgar Mitchell, stated, a few years ago, that he knows we have recovered alien aircraft based on his connections within the military.
