I recently lost my iPhone 4, and decided to give the "Find My iPhone" app a try from a different iPhone. All went well, and i was able to locate it easily and nearby. I realized that i didn't log off of the "Find My iPhone" app on the device I used to locate mine. Is there anyway to log out from a different source since I no longer have access to that device. I don't want my movement tracked by a random stranger. Any help is greatly appreciated.