I'm more surprised at how many people here are surprised.
Approx 1.2% of the U.S. population are potential psychopaths (
http://www.hare.org/references/NeumannandHareJCCP2008.pdf), and I'm sure the condition is much more prevalent among scammers (obvs). Meaning even if you very generously play with numbers and say 1/10000 people is a psychopath (very, very generous) there are going to be ~700,000 people across the globe with no problem of doing this (actual expected numbers of psychopaths is much higher). This doesn't even take into account the people who aren't morally devoid, but are simply desperate, confused, or stupid.
I don't take this to be saying something about a culture or group of people, but of a type of person that is extremely inclined to take advantage of this kind of situation.
Think about it. Something happened that is extremely topical, emotionally grabbing, and best of all has little to no competition (no one else is willing to go there). It's the obvious choice.
(I'm trying to avoid the view of morals as subjective, as it appears to be a touchy subject. So, I'm avoiding them entirely)
P.S. It's horrible, and it should be stopped. I'm not saying otherwise , and never will. I'm just expressing my surprise at the people here who don't expect this to happen on a regular basis, especially considering the forum we're posting on.