Online communities need active human management and engagement. You can't automate yourself out of this, Facebook. It seems like this pattern is repeated over and over. Slashdot figured out a way to have human cultivation aided by software. And the result was high quality. Digg came along and tried to go all software, and it failed. Ignoring these lessons, many, many newspapers open up their articles to unfettered commenting and are shocked when anonymous users with no sense of accountability produce ugly comments.