Jofi Joseph, the White House staffer fired last week (and unmasked on Tuesday by The Daily Beast’s Josh Rogin) for tweeting disparagingly about Obama administration officials, turns out to have been one of those Internet-based tough guys who make Twitter such a valuable medium. A few highlights from an archive of Joseph’s pseudonymous Twitter handle, @natsecwonk:

Jofi Joseph, a director in the non-proliferation section of the National Security Staff at the White House, was fired last week when it was learned he was running an anonymous Twitter account used to torment the foreign policy and national security community.