Since new spam accounts, forum posts and comments have been overwhelming this site, I have had to lock it down:

• Rather than delete all the spam accounts, I assigned all the users I could identify as legitimate or probably legitimate to a new role: "human-authenticated user." These users can post new forum topics and comments as before. If I haven't authenticated your account, please contact me (pat at pdcarto dot com)
• For the indefinite future (until/if we upgrade to a new version of Drupal), new user accounts must be created by an administrator. Email pat at pdcarto dot com if you want an account

I think I have successfully removed all of the offending forum topics and comments. If legitimate content was lost in this purge, I sincerely apologize.

Thanks - Pat