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)