It's really sad. I'm sure there are also people on Kickstarter who aren't scammers, just ordinary folks who don't appreciate the full extent of their commitment. You run into a few obstacles, or your mom gets sick, and suddenly you're on the hook for $50,000 and can't deliver what you promised.
On the other hand, you hear stories about projects who offer too much ("I'll paint a portrait of anyone who donates $7!"), and all their money goes to servicing those rewards.
I don't mean to excuse anyone. Obviously, not everyone is capable of running a business, and Kickstarter makes it really easy for those people to get themselves into hot water.