Believers have a predictable pattern. I don't know exactly what causes it; I think there are a number of reasons. In some cases, maybe no dishonesty is involved. Self-deception, ignorance may be the root. Whatever are the reasons, one of the predictable outcomes is a gross distortion of what was brought to the table by the skeptics. This happens when they find no more room to maneuaver, blocked by an argument they can't counter.
Sadly but predictably, ufology just did this (the odds are its not the first time). No one claimed his or anyone else's recollections are always flawed. No one is even claiming they are incorrect most of the times, half of the times, whatever. Everyone here agrees recollections (as well as perceptions) are accurate most of the times. Everyone here agrees that sometimes, actually a handful of times, it goes down the drain. And I bet most if not all skeptics here will agree with me that weird experiences may happen or be remembered as having happened on the few occasions when human memory and/or perceptions fail. That's when people experience (or remember to have experienced) UFO sightings, abductions, conversations with giant white rabbits, rapes by bigfoot, have sex with aliens aboard spaceships, see Nessie, have mystical experiences, etc. Since these failure cases are not very common, these experiences are also not common. And yes, I think there may be cultural, environmental and biological factors that may trigger these experiences and/or make certain individuals be more prone to feel them.
I will not be surprised if ufology distorts what I wrote above claiming I am dismissing the whole stuff by calling him and everyone else who happens to have had one of such experiences nuts, crazy, mad, drug addict, brain washed, whatever.