Reviewing MathOverflow a recent change that I just now observed is that the reputation of the users who ask and answer questions is not clearly observed within the main page, nor within the question proper - although the vote counts of the questions and the answers are still displayed.
The reputations are available; however, additional clicks may be required to get in to users' pages. See also this MathOverflow meta question.
To me this may be an attractive approach to reduce the likelihood that questions become a 'popularity contest', or to reduce the likelihood that the questions and answers are upvoted based on an appeal to authority (or downvoted due to a lack of any noticeable reputation), and that questions and answers can be judged on their merits more than on the reputation of those who have asked/answered.
Is this an option that we could consider for QCSE, and if so are there pros and cons that need to be ironed out?
Below is what I see now. Note that there is no rep displayed for the askers, the answerers, or the modifiers (although the vote count on the questions is still displayed).