Mmmm...
"System: Rutilant challenges you to a fist fight"
"Rutilant: Have at thee, swine!"
"kweassa: I oWnZ you, d00d!"
"System: the MP have arrived. You are now demoted to Liutenant, 2nd Class"
..

ps) I think craps, poker or blackjack can be more dequate
Maybe a money system that allows you to buy souvenirs from the various Tours.. imagine when somebody checks to see a pilot named "kweassa", sees the decorations, stats, and all the various thingamajics he bought when he was at North Africa, Okinawa, Sicily, Britain, Hungary and etc

hehehe