[michaeln]

We recently launched (http://www.robotoatmeal.com/pages/about/) to address this. We're addressing the scam coupon issue by surfacing real time usage data. We also try to validate the coupon before it's published on the site.

While I think we can definitely do better (the data is pretty sparse in some areas), I believe the collaborative / real time validation approach will lead to a better experience for shoppers.