I'd heard that about Duke as well. Good stick, but not so hot as a skipper. It turned out he was obviously a little fuzzy on the ethics and morality deal as well. But hey, shoot down 5 bad guys and you're set. Hell, these days, shoot down ONE bad guy and you're set. Just ask RADM Fox.
NB: Not implying Admiral Fox is anything but an officer and a gentleman, I don't know him from Adam. I'm just saying, get yerself a bandit these days and you can write your ticket.
As for the "watch out for the smart guys" thing, I wasn't saying that only smart guys get you in trouble. I'm just saying that you gotta watch 'em because they can come up with brilliant, well-thought-out, logically sound and technically clever reasons for doing the most idiotic things imaginable.