A:AnswerI think there's a quite a few assumptions in this scenario. I think its primary purpose is to track your IOS devices in the event of loss. Yes, if a person had nefarious plans, and stole your backup lets say, then yes it would appear on their iPhone. They'd have to find the airtag and then disable it. But there was just a story in the news where this happen and the owner still had their last location and gave it to the Police..By "Access to the tracker" I think you mean can the control it. The answer is no. They could however in theory, take out the battery, reset it, and use their IOS devices to make it "theres".
A:AnswerGood question regarding a teen. There’s a great possibility. My daughter uses it in their car when going to large events in order to locate then car after the event by tracking on her iPhone
A:AnswerIt states on the documentation with them that the batteries last approx. 1 year checking several times a day every day. They take a CR2032 button battery.
A:AnswerYou can definitely tuck it inside. I have mine tucked in an inside pocket (under multiple layers of fabric) and there’s no noticeable loss in signal. Just make sure you’re not putting it between large metal objects (such as multiple computers). While it’s unlikely this will cause interference or signal loss, it’s still possible.
A:AnswerIt lasts about a year and is easily replaced with a watch battery available at any drug store. There is an alert on the app that will tell you when the battery gets low.