When I first browsed the b4b database about a week ago, there were entries in it whose "names" were a jumble of letters and numbers, followed by no more information whatsoever.
So I decided to approach the database ever so cautiously. It wasn't until yesterday that I discovered all of the entries included at least a nickname and some other information.
... I recommend the same course of action to students and teachers with whom I work, basically: "Provide no more information than is necessary until you know what's really going on in any online environment."
... Though I may be failing miserably, I do want to be able to keep the extents and locations of online identities to an affair that I can manage on the whole, rather than one needing updating in all of the particular instances.
(personal correspondence, January 23, 2007)