Just because he reports what he's been told, doesn't mean he believes it.
JUKiller as a name I'd give the player the benefit of the doubt, as it COULD (and does) stand for Junker. I have a squaddie that goes by DieAZ, and to someone that didn't play Air Warrior, that could be considered DieAsians.
It's all about the context.
Granted, I wouldn't want that as a bumper sticker anymore than I would want "Hog Rider" when I park my car near a Jenny Craig, as both can be misunderstood by those that don't play "airplane" like we do.