At the moment of writing this we have a couple of identical questions on the site:
A default action should be voting to close one of them since it is an exact duplicate (which I did). The problem is it takes 5 votes to close the question and, well, I'd say that we don't have enough people to think about such activities. On the other hand it doesn't seem appropriate to flag this question, as that's what dup close reason was designed for.
My question is what we can do with such cases? Flag so we bring moderators' attention up? Leave it as it is? I don't feel well with the latter by the way. Something else?