[Hizonner]

> I am willing to be educated; does the average schoolkid carry such a device?

Yes.

On at least Android phones, and I'm pretty sure also on iOS, location access is a user-controlled permission that's not necessarily granted to any given app. There always leaks, but are you going to require commercial software to play cat-and-mouse games to get around system security settings?

And some, possibly most, "social media" can also be used without apps.