Some folks don't use (or have) a real "first name": W.Clement Stone, F.Scott Fitzgerald ...
In my other reality, "gov't issue photo ID" says {X Caveat Empty}, as does the primary points-plastic; others are just X C Empty. Even TSA doesn't bat an eyelash.
The only real fuss comes at Travelocity -- first 'name' has to be 2 letters; X-dot makes it acceptable, but you can't login...
On another website, we call them 'farktards'.
No problem - no business for them.
/.