He was an unstable looney freak. While I don't think that the stunt he pulled was a big deal, it just reflects the kind of strange, deceitful, out of touch person that he is. He shouldn't ever be let back in.
And all the crap about the aliens was annoying. I never bought his stories anyway, and was pretty vocal that the "abductions" were just signs of mental problems. I tried telling people not to believe him, but the idiots bought his stories, hook, line, and sinker. That much was their fault for being so gullible.