[quote=Byrd Man]
Huh. That doesn't seem to safe to me. It's illegal to wear headphones and earbuds while driving in some states, just figured that would also apply with a fighter jet loaded with weapons.
[/quote]

They're not supposed to do it. They're not supposed to bring any FOD hazards into the cockpit. I'm not quite sure how they balance radio requirements with earbuds. Probably one earbud in, the other out. 

Very nice post!