It seems really pathetic to me when parents can't offer their teens privacy. I have a child and I want him to trust me. Invading privacy feels like it would have the opposite effect and create a very one-sided relationship. You can ask my mom how much she knows about me now and its considerably less than my boxing mates.
Ain't that the truth. I'm constantly fighting this fight in my own city where we only get bike gutters, not even lanes. Complain complain complain from the people who claim they care about the neighborhood.