Actually, a lot of people pointed this out, as well as the suspicious address, and other inconsistencies (her age, lack of presence in the MIT student database, ...)

Check out http://twitter.com/fakerobinsage etc.

The only question at the time was "is this a recreational troll, or is it a "security researcher" trying to test the community?" -- it seemed too amateurish to be a real intelligence gathering attempt.