It's okay to talk about it with other Blanks, just not where it could be overheard.
*has to think about that for a few seconds*
Twenty-eight that we know of, plus three dead or inactive, and at least one god who left rather than become a Judge. In no particular order: King, Queen, Messenger, Beauty, Persona, Storyteller, Mirror, Game Master, Beast, Flowers, Haunted, Veiled, Angel, Clockmaker, Foreman, Gambler, Lover, Shadow, Soldier, Dude, Kid, Twins, Graces, Waterbearer, Huntress, Horn, Guardian and Librarian. Of those, the ones known to regularly be dangerous are Huntress, Game Master, Flowers, Storyteller, Persona, Mirror, and Horn in combination with certain others. The rest may or may not be, but tend towards harmless. Guardian watches over the Judges' enforcers, Ophiuchus; he doesn't run games. Waterbearer may or may not still be alive and sane, at this point; we don't know.