Unfortunately, if we are cynical enough, only people who don't do their due diligence get scammed by these guys.

And in that case, the problem is not really the scammers, but people sending money without being absolutely sure its not a scam. In essence, these investors are highly emotional and prompt to dump at the first sign of troubles.

In the end, everyone has to learn the hard way that not doing the due diligence is a major mistake XD