Fravor admitted to UFO pranks in the 90s (gliding over camp fires and then turning on afterburners). Some were found reported on UFO forums at the time.
I would not say he admitted it. More like told it as a funny anecdote in juxtaposition to what he experienced.
People went back and found UFO reports on 90s forums for the location he said he did it.
Yeah, it can undermined his credibility a bit. Maybe a prank from someone else?
Yea I thought it was a hilarious way to debunk UFO reports of the past by civvies on the ground who lack advanced warship and get fighter radar systems.