First it was your inbox. Then your blog. Now it is social networks geared around promoting news stories, as Seth Godin shows us. Furl, Digg and all the open source clones popping up are vulnerable.
Why? I think age. Primacy/recency theory notwithstanding, the popularity of these venues, combined with the neophyte composition of their userbase, was bound to attract scammers. Meanwhile, those sites with established user groups, with their loyalty and intolerance of trollers, tend to self-regulate much better – almost by default at this stage of the game. I say, so much for the death of Slashdot at the hands of Digg – it ain’t going to happen.