Can anyone else verify this? Go to the Settings icon, choose the messages option, then turn iMessage off. Wait a few seconds and turn it back on. It will ask you to reenter your iTunes account password. Hit cancel and wait...it will say "waiting for activation" and will activate iMessage without a password. I changed my iTunes password and tried this again and it allowed me to send messages on my iPhone 4S using iMessage without a password. This is a major security flaw if anyone else can verify. If someone found your phone and you reset your iTunes password, they could still text your friends also using iMessage without a password.