The user profile for any given user is visible even when not logged in. The profile page lists: username, Full Name, email, Jabber Address, Groups, and Source Repository Alias. Much of this information is semi-private and shouldn't be publically displayed. Especially email addresses, as that opens up massive spam. Please consider hiding email, Jabber Address & groups.

An example user profile page is at: https://www.limewire.org/bamboo/browse/user/sam