Well this has been a problem since the release of Mys v1.2.0, I plan on resolving it for Mys v1.2.4, the last maintenance release for Mys v1.2.x series before Mys v1.3.0 is released. For quick fix, go to your shoutbox.php file and make the following changes:
Right below you see the 'Start Script' Block, add:
PHP Code:
if($isloggedin == "yes"){
Then delete these lines:
PHP Code:
if ($isloggedin!="yes") {
$user = "Guest";
}
And add the following codes right above the 'Output page' block:
PHP Code:
}
else{
$article_title = $accden;
$article_content = $reqlogin;
}
This should be able to prevent any guests from using shoutbox, give a try on your site and lemme know if it does not work.