This story was mentioned in the comments a couple of days ago:
From the tweeted link:
In the future the Truthy research team hope that the public will use the tool to report on other Twitter users.
Twitter data to track social pollution
Researcher at the Indiana University created the “Truthy” database to track the political smears, misinformation, and other social pollution. So far, the University has been granted $919,917 for the project.
The major aim of creating this database from Twitter is to identify the creators of the memes, whether they are professional political activist or regular internet users. According to Truthy “About” page, content spread by the shady machinery of high-profile congressional campaigns is an example of the political daub spreading the misinformation and other social pollution. The core idea of this project would be the identification and containment of such content. Truthy is capable of identifying the false and misleading ideas, hate speech and the dissident propaganda, thereby encouraging open debate.
Seems to be working: