If I think the witnesses are not completely incompetent and gullible, I'll have to consider what they say: that they did indeed experience something that is not explicable by fraud. Although admittedly with all the absurd and silly stuff and the sitting around in total darkness, that's not easy.
And who said, if it had been genuine paranormal phenomena, there would have been a "freaking immortal spirit with incomprehensible powers" involved? Maybe it was just a simple trickster fooling around who likes to keep things absurd and ambiguous.
I don't exclude the mediums from being tricksters themselves, but I wonder why anyone trying to get away with an elaborate hoax like that would come up with such obvious nonsense like alien grey images, people from the future with silly names, eye-rolling faces etc.
I haven't heard anything about a magician's box from any of the witnesses, btw. As far as I know, they all say they were holding the box containing the film. Hearing it from a debunker like Brian Dunning, I really don't know who the misdirection is more likely to come from. Like Dunning, I wasn't there myself, but unlike him, I'm not assuming that the witnesses are all brainwashed believers, stupid or fraudsters themselves.
All I have to come back with is, "It is a well thought out trick."
No. You'll at least have to find a good explanation for several bright light sources moving around in the room, apparently on their own, with no hidden thread, fibre or cable attached. If the professor who was brought in as a sceptic and who tried to catch one of the lights in his hand had felt anything of the sort, he would have said so.
Well, unless he's in cahoots with the mediums and getting a share of the profit from marketing the "experiment". Which should be rather slim if at all existant, considering the cost for purchasing all the old objects and newspapers, a photolab, equipment which would allow a very skilled person to move around silently and undetected in total darkness in a crowded room, preparing the rooms with hidden doors, compartments and trapdoors, researching the private life of the "witnesses" (think of Montague Keen's music piece or Mr Dalzel's late friend) etc.