Well, I think there are very good reasons for staff to be publicly visible as staff. For one, having them operate on anonymous alternate accounts would kill the effectiveness of the scholars completely, who are meant to be obviously apparent as people one should go to with questions and such. I'm assuming this is all more addressed at the mods anyway, so I'll put this out as a counter consideration: would you rather the possibility of some people liking their colored usernames a little too much and therefore joining staff for the wrong reasons and abusing their power in very obvious ways, or people misusing undemarcated alternate accounts and operating like a secret police? I'm almost certain the latter would have worse results, both in the worst-case scenario and in general.