The leading post in this thread was excellant. I have known a few "rogues" during my career, and I'll certainly encounter more. As an FO (for the better part of 6 years now, against my wishes, of course), I do what I can, but as always, the captain sets the tone and I try my best to be a chameleon and not let these rogues damage me, my career, my company's ability to provide me with an income, the airplane, the people in the back, or anything else (maybe in that particular order, maybe not, depending on my own mood).
Just a few weeks ago, I was sitting in recurrent, and we were on a break from class, sitting around, shooting the breeze. The one guy from my class was telling a story about how some captain and him flew into an uncontrolled field a few months ago. Overflew the field at 800', entered midfield downwind, and "cranked it around", still "banking and turning final, like, at 200 feet". He said it was awesome. I made a weird face and said, "well, thats all good fun and sporty flying, but they don't pay us to fly these planes around to have fun and do stuff like that with 50 people in the back". Kinda shut him down, but it pissed me off, and I hope it made an impression, whether he thinks I'm a jerk or not.