Why shouldn't we care about character issues. These guys have to be together eight monthes out of the year.
We should care about it to the extent that it impacts his ability to perform or that of his teammates. That is the big question. Can he keep himself under control and not be a distraction in the clubhouse?
But beyond that, once you start wanting guys to exhibit a certain level of "character" or live by a certain moral code, you are probably going to disqualify a huge percentage of the players in baseball. You woudn't want most of these guys dating your sister, but that doesn't mean you don't want them on your team.
Dukes is an interesting case. He is not much different than a lot of people with similar backgrounds. We see guys like that come out of college with bad reputations and checkered pasts and many go into the NFL or other pro sports and do just fine (obviously, some don't, and they need to be weeded out). Dukes has spent his ages of 18-22 in minor league baseball, and quite frankly, that can be a really bad an environment for a young man with troubles to be exposed to. Talk about character issues. Without the right kind of mentoring within an organization, a guy like that could get lost.
I would have zero tolerance for some gangsta punk thug in the organization. But given this guy's background, it is not surprising that one run in lead to another. He is now at an age where he needs to decide what he wants and show some maturity. He deserves another chance to choose a different path.