The name and user ID of registered users of the wiki are made publicly accessible through the Internet. E-mail addresses are used only by the site administrators to contact users with information about the site (such as a move to a different address or a change in policy) and by the wiki software according to the options selected in the user's preferences (e.g., notification of changes to pages in the user's watchlist).
If you edit without an account, your IP address is visible to everyone. If you choose to use an account, your IP address may be disclosed to administrators via the CheckUser extension, and shared with others in cases of persistent vandalism.
Information placed into wiki pages is publicly accessible.