I know Indiegogo is hard at work towards building automated scam/fraud detection systems. I work in this space (I build such systems for Eventbrite) and from my conversation with them it seems they're new to these problems but are making them a priority. Now Indiegogo has a slightly different model (campaigns can be created by anyone and are not curated) than Kickstarter that makes it more of a priority for them, but hopefully with the recent cases of fraud on Kickstarter they're putting more work into prevention as well.

All in all, I don't think it's an inescapable problem. It is perfectly possible to build scam-detection systems (we do so at Eventbrite, to prevent people pretending to be selling tickets for an event they're not actually organizers of), and although it's not easy as these crowd-sourcing grow larger they'll hopefully have more resources to put behind it.

[1] Like this guy: http://www.onthemedia.org/story/new-kind-kickstarter-scam-ba...