My brother had a similar problem with one of his daughters. He took her cell phone for 30 days. He was "the most hated dad in America". Then when she earned it back the phone was put on his nightstand after 8 or 9pm (can't remember). He and his wife were all up in her business "ALL THE TIME". He was never afraid to pull her car, phone, whatever it took. He said his only goal at the time was to get her to graduate high school and for her to not get pregnant. He wasn't looking to be friends with her or anyone else. At times his wife would say he went too far. She graduated and is now on her way to a field in nursing. No kids. And the best thing is they have a very strong relationship. So many people being a parent means you have to be a friend or your kids will run. I disagree.