Reading a ticket works without logging in, but only if you know the URI (e.g., https://www.fossil-scm.org/index.html/tktview?name=...).  If you don't know it, then the list of tickets tantalizes you with a summary and a hex name but there is no link to the full ticket page.  Why disable the links for users who haven't logged in?  I know I can log in anonymously, but having to do so just to browse tickets seems an arbitrary and superfluous barrier.  It probably also means that search engines won't index the tickets.