jjt is way off on this.
first of all, behavior off the field is absolutely a fair criterion for continued employment on it. as jjt admits, that is the case in every other walk of life.
secondly, drunk driving is in no way comparable to dez bryant throwing a baseball cap at his mother. rather, it is like walking into a crowded supermarket and waving a loaded gun around. just because you're lucky enough that it doesn't go off and shoot someone doesn't mean you're less of an ***hole.
i know the league has programs and graduated punishments for substance abuse, and that's fine. but drunk driving is more than just alcohol abuse, it's putting lives at risk. players who get convicted of it need to be suspended from the league for a full year.