If an individual writes a document for public consumption anonymously or pseudonymously and either explicitly or presumably desires to remain anonymous, is there a Halachic issue with publicly unmasking the author, or with publicly assembling information about the author toward the goal of unmasking them?

This activity ("doxing," in Internet slang) is practiced in various Internet forums, and the ethics thereof are a subject of controversy. It's potentially relevant on a forum like this one that values contributions from pseudonymous authors.

If sources address this activity, do they distinguish regarding the nature of the material that was anonymously authored - whether it was Torah, objectionable, controversial, etc.?