Moved creation of guest user to login page - this means it can be

trashed any time and it will recreate itself as necessary.

admin/user.php

@@ -44,20 +44,6 @@
         $USER->admin = true;
         $USER->teacher["$course->id"] = true;
 
-        // This is also a good time to make the Guest User
-
-        $user = NULL;
-        $user->firstname = "Guest";
-        $user->lastname  = "User";
-        $user->username  = "guest";          // This user is identified by this
-        $user->password  = md5("guest");
-        $user->email     = "root@localhost";
-        $user->confirmed = 1;
-        $user->timemodified = time();
-
-        if (! $guest->user = insert_record("user", $user)) {
-            notify("Could not create guest user record !!!");
-        }
     }
 
     require_login();