You are very sweeping in your way to argue your case.
For example your two reasons to keep a secret. Are you lost? There are more reasons why they would not disclose the due diligence information. The most obvious is that it did cost money, and whatever conclusion it came to is theirs to ponder. Understand BTW that the investment came AFTER the due diligence. Something to most people is an obvious pointer on the outcome. Nevertheless, they do not want to share that information to other investors, so the can freeload. They must find their own data and draw their own conclusions.
I haven't read your deep analysis on the non validity of NDAs, however beautiful prose it must be, but you seem again very lost, as you think that breaking an NDA is something safe to do. It is very much not so. As an individual you will be mangled in the courts until you break down into bits, if the corporate counterpart so wishes. The Italian temperament of AR no doubt would take this to the limit of prosecution, if Fabiani or anybody else would break the NDA. After all, the E-Cat is potentially worth billions on the market, and nobody would sit idly by, letting all that money go down the drain. So he does indeed have plenty to loose by breaking the NDA.
On the other hand, your reasoning is backwards, as you mean the NDA is no problem, well, if it is not, then if Fabiani had found something fraudulent or inappropriate, then he would come out with it ? A stand up guy like him? He has not, so there, in your own reasoning, you have another social piece of evidence that AR is not fraudulently and scamming people left to right, stealing money hand over fist.
As with so many other things you written, you convey your ill founded opinion as though it somehow was the truth.
"There is a multitude of worries that any kind of investor should be aware of and know about."
Really? I would say that the scientific and social evidence base is steadily increasing, indicating that exactly those "worries" are dissipating. And personally, I trust the judgement of Woodford a hell of a lot more than I trust you. Not because they in themselves are so very trustworthy, per sé, but rather because you think we should believe you and follow your non coherent logic because you "in the late 80's worked for Japanese technical intelligence"? Please. We only have your word for your self proclaimed excellence, and as your logic does not make sense, that is in no way enough.
Sorry, but I fail to see why you waste your time here. You were banned at Frank Acland's site, one can discuss the fairness in such an action, but seriously, you have no real matter to contribute, but your anger, ill informed opinions and incoherent logic.