Michael Irvin was a dick but he was also one of the best wide receivers in the game at the time. There's no way he would have been fired for his minor infractions with the law. I mean, Ray Lewis was out with his friends who were KILLING people. Good ole Mike was just hooked up with some coke and hookers in a motel. I don't really care about Plaxico Buress and booze.
Do you really consider cocaine use and prostitution minor offenses? I'm not sure the legal ramifications of it, but I'm pretty sure any amount of cocaine possesion is a felony charge, and I don't consider that minor. Prostitution, well, that's a whole different kettle of fish, because that should probably be legal.
I will give you one thing, though. Emmitt Smith is a decent guy, and, while I don't think he's as good as Peyton, he is a good RB.