if you got php scare them a little more:
if (getenv(HTTP_X_FORWARDED_FOR)) {
$ip = getenv('HTTP_X_FORWARD_FOR');
$host = gethostbyaddr($ip);
} else {
$ip = getenv('REMOTE_ADDR');
$host = gethostbyaddr($ip);
}
$host often shows them what isp they are using.....
www.eraseyourtracks.com