> Is it okay to sign up for the Paleodiet list and just lurk?


As the signup info states:

>    Students or members the  lay public are not necessarily excluded,
>    but any messages submitted to the list membership  will be reviewed
>    before distribution to assure that the information presented, or the
>    questions posed, reflect an appropriate level of understanding of
>    the science underlying the subject under discussion.


That means anyone is welcome to join but if you post your message will be
reviewed before being cleared.  Anyone is free to join, or to just read the
archives (http://maelstrom.stjohns.edu/archives/paleodiet.html).