I like the idea, and I like the simplicity of the interface, but I was disappointed by the results.  Most of my results were classified as "not spam," but a cursory inspection suggests that at least 70% were actually spam.  Conversely, one of the three accounts marked as spam was definitely not spam.<p>As an example, here's one of the accounts that was marked as "not spam": @PhatApples   (NSFW!)