I understand from recent discussion that moderators may be able to see users' registration email addresses, e.g., when sending out warnings.
What permanent user information (email, login IDs, etc) can be viewed by moderators?
What session-dependent user information is visible to moderators (who is logged in, postings currently being read, edits in progress, etc)?
Can any of the high-reputation users view that information?
What are the answers to these questions for MO and MO.meta? I cannot actually ask this question on MO.meta because, due to exactly these privacy concerns, I did not complete the application for the meta (MO differs from SE in not allowing automatic posting access in meta past a certain number of reputation points).