Source : Free On-Line Dictionary of Computing

read-only user
     
         Describes a {luser} who uses computers almost
        exclusively for reading {Usenet}, {bulletin board}s, and/or
        {electronic mail}, rather than writing code or purveying
        useful information.
     
        See {twink}, {terminal junkie}, {lurker}.
     
        [{Jargon File}]
     
        (1995-02-28)