This post is in part to let moderators and the community know to be on the alert for a particular user and post, and in part a question about what the policy should be for this kind of behavior.
What should we do when a (pair?) of users keeps posting the same question over and over again on multiple SE sites?
This user and another user (I believe, this user, but many of the posts have been autodeleted) have been repeatedly posting very similar questions on biology, medical sciences, chemistry, and skeptics, asking about blog articles and news reports on aquagenic urticaria.
Here is a recent example from biology.SE. This was the third time the question was posted in as many days. The answer did not appear to satisfy the user, since the question was subsequently posted once a day on medical sciences, and once a day on chemistry.
Some of the questions have been closed, downvoted, and autodeleted, and I don't have a link, but, if I recall, moderators and high rep users can view deleted questions. Per a moderator comment on a recent closed version of this question on skeptics, it seems possible that the two users are the same individual:
This is the fourth time this same question has been asked by you and another user from your home town, with very similar writing styles and similar refusals to accept that Aquagenic Urticaria is not a harmless skin condition, and that a newspaper writing about "allergies" to a lay audience might not be using strict medical definitions of the term. There is nothing left to explain here.
This behavior does not appear to be commercial spam, but, does feel a lot like the original message board spam... annoying repeated text. I can see an argument that the system is working here (prior questions are closed and autodeleted, current questions are closed, sometimes as duplicates, and downvoted), but for some reason it's getting under my skin (as things sometimes do). What's the policy here? Just keep downvoting and voting to close? Or is there a point where something else should be done?