Disabling SSID broadcast may be effective against casual wireless snoopers, but many people don't even recommend doing it at all. It makes it harder for people who are supposed to be connecting to your network, and the SSID can often be read, anyway. (This is especially true if you have Windows XP computers on your network; if they are configured to use your wireless access point, they will broadcast the SSID even when not connected when they're "looking" for it. But in any case, the SSID can often be snooped anyway.)