So, in conclusion, I am looking for a constructive conversation, not a one sided view on the matter. I understand you have your view and opinions, but they aren't the gospel, and I hope you see that...
Your previous reply had been there sometime and nobody came along to agree with you.
I fail to see how any of that is relevant to the product in question. Tell me why someone is more likely to be scammed buying one of these than they are a Casascius coin on eBay? These aren't even collectable so there isn't even a reason someone would attempt to buy one of those other than from physical outlet. Your example of someone selling the card to 3 people just doesn't make any sense.
On that note, the flaw with these "Bank notes" is that they are still handled by human beings, so there will always be the human element to take into account
Any wallet is handled by humans. Scams can happen in any form. Describing that as a flaw is ludicrous. The fact that they can be physically checked makes them more not less secure.