Yeah, I'm not sure that's a good case for revealing sources and methods. Next time, she'll drive to the friend's house and cop a ride the rest of the way. There is the risk of an arms race, where the kids learn how not to get caught rather than the intended lesson.
These new tools are just that -- new tools. They don't change the basic job, and while they might make the job easier, they also raise new questions and introduce new complications.
If her parents are smart this young lady will not see a next time for quite a while. I don't care about whatever the kid might do to cheat, she got caught and needs to know that being a liar to one's parents is the one thing in life she can never do....