What would you do if your 17 year old was trying to leave home just because they didn't like your rules?

I'm not asking for me, but there is a moms group on Facebook that I'm in. This woman shared that her 17 year old son avoids speaking to her every day and has picked up more than one job to save up money so he can leave. And he wants to leave because he does not like her rules. When she found out he was having sex with his gf she put a tracker on his car, only lets him go to work and school, and makes him print out time logs. She also makes him pay bills because "he wants to act like an adult so I'll treat him like one." I did not say anything to her because all parents will parent differently, but I don't know what I'd do if my 17 year old despised me over something like this. Lucky for me my daughter is just 2 lol