Caveat Emperor is a bit of a worldplay --
On one hand, it's a frequent misquote of the legal term: "Caveat Emptor" which is standard legalese for "let the buyer beware." I figured it'd be fitting for a law student and a Star Wars fan.
On the other hand, it's also latin for "King of Qualifications," which I was always accused of by friends when talking about sports. I was always fond of the "Yeah, he might be OK, but..." arguments when discussing players.
I made it up on the spot when I needed a username and wanted to do something different than usual.