Not sure if there is any Obscurity Index, but here are some from the gamut..I mean hater mut.
0. pathik
1
.. (opener)
2.
psychic (also known as Member with the Least Posts)
3. babubangla (not sure if it is a compliment)
4.
Nickname: "Superman on Drugs"
5.
observer Obscure? But Powerful.
6. Tehsin
7.
GodSachin (one of the names that got away with God in title..the other? )
8.
Mr. Jurgensen (wk - sorry!)
9.
sage (Not the rapper S.A.G.E es e jii ee es e jii ee es e jiiii ee)
10. Gopal Bhar (spinner...and I don't even spin..so lol Go figure!)
11.
reverse_swing
Extra Man: Go buy my new ebook yet; it's out just now