As regards the lack of witnesses and things happening when people were not looking, that seems to be all in the rules of Fortean phenomena, it does not like being seen sure it will do things to alert you of it's presence it will sow ambiguous evidence all over the place, but does not want you to get too close to it, it's always been that way, it's no surprise that some investigators go insane trying to work it all out, it will relish all the debate about Enfield and other cases, any attention is good attention just as it loves the wild goose chases after someone spots a black panther in the wilds of Dorset