A commenter asks, perfectly fairly:
I started reading Volokh a year or so ago. None of these seemingly dozens of pseudonymity posts have seemed interesting enough to read, including this one. IANAL. Is pseudonymity actually a serious legal issue or just a weird obsession of Volokh's?
Well, yes, it is an obsession of mine; I wrote a 100+-page article on the subject, and am planning to put together an electronic treatise on the Law of Sealing and Pseudonymity in Litigation. And one reason I'm doing that is precisely that academics and others generally haven't focused much on the subject, so I suppose it is indeed a "weird" obsession.