[MPDev]

I noticed this didn't work using additional usergroups; only primary. So I made a couple minor changes to cache the $decimators and the users memgroupids.

global $candecimate;
global $vbulletin;
global $decimators, $allowedids;

if($vbulletin->options['sd_enabled'])
{
    $candecimate = false;
    
    if ( !$decimators )
    {
        $modgroups = explode(",", $vbulletin->options['modgroupid']);
        $supergroups = explode(",", $vbulletin->options['supermodid']);
        $admingroups = explode(",", $vbulletin->options['adminid']);
        $decimators = array_merge($admingroups,$modgroups,$supergroups);

        $ids = $vbulletin->userinfo['usergroupid'];
        if ( $vbulletin->userinfo['membergroupids'] != "" ) $ids .= ",". $vbulletin->userinfo['membergroupids'];
        
        $allowedids = explode( ",", $ids );
    }
        
    if(!in_array($post['usergroupid'], $decimators))
    {
          foreach( $allowedids AS $allowedid )
          {
              if(in_array($allowedid, $decimators))
              {
                    if($vbulletin->options['sd_postmax'] > 0)
                    {
                        if($post['posts'] < $vbulletin->options['sd_postmax'])
                        {
                             $candecimate = true;
                        }
                    }
                    else
                    {
                        $candecimate = true;
                    }
              }
          }
    }
}
else
{
    $candecimate = false;
}

if($candecimate)
{
    $template_hook['postbit_controls'] .= "<a href=\"#\" onclick=\"window.open('decimator.php?userid=$post[userid]&amp;threadid=$post[threadid]&amp;postid=$post[postid]','spam_decimator','statusbar=yes,menubar=yes,toolbar=yes,scrollbars=yes,resizable=yes,width=800,height=600'); return false;\"><img src=\"images/misc/spambutton.gif\" alt=\"Spam Decimator\" border=\"0\"></a>";
}