I was wondering about this myself, but how do you know that MUFON has not investigated these cases? Most of these cases are well-known. I would assume that several of MUFON's investigators would have looked into them over time.
When I raised this question on Robert Sheaffer's blog (linked in Chris' OP), a MUFON official responded:
Terry Montgomery GroffMarch 13, 2014 at 3:03 PM
"No, MUFON claims these programs are based on files in a real storage area in Cincinnati, Ohio that they call Hanger 1. Everything in the program does indeed have associated files in storage including information on Presidential encounters."
In the first episode, it was a collection of UFO stories relating to Presidents. These stories preceded MUFON, and if they did any additional investigation, it was not mentioned, they merely repeated the legends. As the show purports to be about MUFON investigations, that is at least a little misleading, because having a folder of UFO clippings does not equal an investigation. I've spoken to a MUFON state director and he admits the shortcomings of the program and assures me that later episodes
will feature cases that MUFON has investigated.
A partial list of discredited sources used in Hangar 1: Bob Lazar, Meade Lane, Philip Corso, MJ-12, Phil Schneider.
There are even more unsubstantiated sources such as the Barstow CA 2009 crash retrieval which was based on a second-hand story posted on a internet message board. the Jackie Gleason story is from a National Enquirer story of a second-hand account. I don't know the source of the JFK story about him being murdered over disclosure, but that has to go in the rumor pile, too.
Dwight Equitz is a high school teacher that does some acting on the side, most often "voice acting" and narration. On "Hangar 1," he portrays a UFO researcher."
See his blog for discussion of some of his voice work:
EQUITZ.COM
My objections to the show could mostly be fixed by them just changing the opening. Stop saying theses are cases investigated by MUFON. Admit that what they are discussing is UFO rumors and legends.