Like mentioned earlier, this people are hardworking in this behavior that it'll be hard to escape the first scam. Surprisingly, some people end up trusting them the second time. Basically, I'm referring to such people who repeatedly fall for the strong aura of friendliness exhibited by these con men. Have met a man who belongs to this category of heedless people, like many of them, he's funny and nice to spend time with. Easily anybody would trust them over and over, they are also great at apologizing for their wrong doings. That's why I suggested distancing such people when it's about money.
I talked about my personality because 3 years ago, a junior friend entrusted a huge amount of money in my bank account for many months, he said I was the only person he could trust with that kind of money. I was so surprised because this guy has a family and too many friends as a lively person and a socialite. Such like him would have many rich friends, yet he couldn't trust them with his money. It is not what people tell or shows you they are but what you know they truly are. Their true self can't hide.