Wikipedia allows anonymous edits but it does track the IP of anyone who makes the edit. So a Cal-Tech computer grad student, inspired by news last year that Congress members’ offices had been editing their own entries, and curious whether other organizations were doing anything similar, developed a program to make it much easier to see the affiliation of anyone who made edits to any Wikipedia page.

This has led to numerous revelations about corporations like Fox News, organizations like the CIA and individuals such as staffers for a current US Presidential candidate abusing the intent of Wikipedia

(via MetaFilter which has lots of other links I didn’t include in this post)