Wilde asked the question about the locker room post-Sitton, phrasing it in terms of potential effect. McCarthy did answer that everyone, players included, are evaluated in terms of the effect it might have on the locker room.
I'm not sure this was a confirmation of the haughty and uncommunicative report that it looks out of context. He didn't deny to or go around the question, but he also didn't address it directly. The most I would glean from this is that Sitton *might* have become a problem and that was a cause for concern.
So I don't think we have any confirmation that he was a locker room cancer.
Video:
http://www.packers.com/media-center/...6-495e3cc50510