Hah! I hadn't thought about the possibilities in "capitalizing" on pH-D!
In truth, I am a university professor, so yes to the PhD -- but I really wasn't trying to advertise that with my username. The first forum I ever joined, I used "awake" as the username, because that combines my first initial and the first part of my last name, and thus is easy for an absent-minded person like myself to remember.
I tried to use it again when I joined other forums, but kept finding it already taken, so finally resorted to "awakephd" -- which, so far, has never been taken on any forum I've joined.