I put a tracker on my teens' phones. It's for safety reasons more than lack of trust.

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My teen years were full of wild, off-grid adventures with my peers from morning to midnight. It was the 90s, and I didn't have a cellphone, so once I drove off, I was "out of sight, out of mind," and my mom got to be blissfully clueless about my shenanigans. All she could do was pray for my well-being and have faith that I was honest about where I was going.