Yes clever!
Thing is, the Facebook profiles seems genuine enough, so either these people are very stupid or the scam is more sophisticated than it appears.
You'd be surprised how many people fall for very obvious scams, be that "Microsoft calling to fix you computer", "BT calling to fix your broadband", or people buying shit off people who don't own it.
There are tricks, which I can't say I understand, which are essentially a form of hypnosis, that the better scammers can use when they have you in a 1 on 1 conversation (such as a phone call or face to face). So if they can initially get you on the hook....
(and those who genuinely believe they are immune and can't be fooled are said to be the easiest to reel in, as long as they can be hooked)