My eldest is about to start seventh grade at my old school. He now has his mother's used iPhone, and texts quite a bit.
We monitor internet use on the phone (we have a program that sends a weekly email — he's gotten busted for watching YouTube after lights out, but not for content), and reserve a right to review his email and texts. My wife exercises this right — the boy ducks his head and rushes from the room, embarrassed, probably because he's texting a few girls and has started to realize they're flirting with him.
So: how much do you monitor tech usage by that age group? After this question, I will go back to decrying the NSA.