my $is_bad = 0;
	$sth = $dbh->prepare (qq{ SELECT * FROM `forbidden_usernames` });
	$sth->execute();
	while($row = $sth->fetchrow_hashref()) {
		if ($row->{f_user} =~ m/$str/i || $str =~ m/$row->{f_user}/i) {
			$is_bad++;
			last;
		}
	}
	$sth->finish();

if ($is_bad != 0) {
	return("bad");
}