public function AddArchiveWhere($Sql = NULL) {
		if(is_null($Sql))
			$Sql = $this->SQL;
		
		$Exclude = Gdn::Config('Vanilla.Archive.Exclude');
		if($Exclude) {
			$ArchiveDate = Gdn::Config('Vanilla.Archive.Date');
			if($ArchiveDate) {
				$Sql->Where('d.DateLastComment >', $ArchiveDate);
			}
		}
	}