How about if your kid tells you he or she is going to a movie and ends doing something else? Something they are not suppose to be doing. You must not have children.
I think this kind of technology is good. Being a kid and pulling out the battery just so your parents won't know where you are just shows that you are going to do something that you shouldn't be doing. That kind of logic is flawed. If any of you remember how it was when you were a teen, you should know that teens do stupid things. It is a wonder that I didn't get killed a few times hanging out with veritable idiots that wanted to show off either behind the wheel or other things. As far as privacy, yes they should have a little but not much. Parents should be active in their kids lives. They shouldn't let their kids run unchecked. We already have too many of those kids runnging around and causing problems.