Hi. I have a wifi iPad 2. I used the 4 digit passcode but I've been wondering if that is a mistake. I've enabled the Find my iPad feature but if someone takes my iPad, they won't know the access code so they won't be able to start it up and get it on their wireless network - therefore I won't be able to find it. If I removed the access code, they could start it up and connect to a network, which would then allow me to track it. I'm concerned about my data privacy but I also want to be able to track my device. Should I continue to use the passcode? If I do, and someone steals my device and is forced to wipe it, is the tracking functionality useless?