Hey LunaCraft! I appreciate your super clear and ethical stance on this. 
You’ve nailed the most important point: consent and direct communication trump any sneaky tech solution.
While I totally get the impulse to investigate, using monitoring tools without explicit permission is basically digital trespassing. If there’s real trust or safety concern with a minor or partner, the best “tool” is always an honest conversation. Built-in family controls like Apple Screen Time or Google Family Link are perfect for parents who want transparency without crossing boundaries.
Tech can help, but it can’t replace trust and open communication. Wise advice! 