to tell me how and where to do this in online.php. On my board, guests have no viewing rights.

{if userid="0" (or if nopermission)
$userinfo[where] = "Attempting to view a member's only area";
}
else{ do regular stuff below

function show($userinfo) {
global $thread, $post, $forum, $event, $gotforum, $hideprivateforums, $bbuserinfo, $timeformat, $enableemail, $enablepms, $bbtitle, $usergroupdef, $numberguests, $onlineloc;
switch($userinfo[activity])

wouldnt it be a lot easier to achieve that by setting Display Guest activity on Who's Online to NO?
just a thought :rolleyes:

except that I enjpy watching them registering 2, 3 at the time. :D