What's wrong with giving out your name?
Shows a little bit of pride in your job. Coach drivers do it, guards or whatever they are now called on trains do it...
which reminds me, a year or two back I was on a SWT train before they were taken over by SWR, and the Guard was Tom Riddle...... I did ask him when he was inspecting the tickets, if he was a Lord etc etc, but apparently few people picked up on it (mostly young children)