I don't think they would do this to fine out everyones identity, but they may be interested in finding out someones ID because they may suspect it to be an active CO or perhaps a "disgruntled" bethelite high up the Organizational latter.
I think we just need to be reasonably cautious about how much info we may give thru PMs to posters we do not personally know.
The anomanimity we have here is truley great it allows COs, DOs, and other key men to post information that can really destroy the WT. I'm sure we have these type of posters on this forum that are clever not to let thier true ID or anything close to thier true position in the Org. to be revealed in thier posts, and they know how to leak info and not get the ax by the GB.
You can bet after Silent Lambs, Kim Norris, Barbra & Joe Andersons, and Maximus as well as others who have posted here,, that the GB and Legal are watching this site to see what else developes, and may try to get sensitive info to help thier cause.