You would think the blade turn up/down would give him some idea something was not quite right, but they are out there and the problem is they also breed.
Yer. No clues, and no common sense, either.
It's not as if it's as hard to access 'how-to' info as it once was, before the interwebs.
I remember those days all too well, and I seriously wouldn't want to return to them!
That said, one does need to have a working 'bullshit filter', to make effective use of what info's out there, in cyberspace.