You're discussing organised conspiracy, opsec across teenagers here, and a subject knowledge cover all sorts of different networks and devices across a single source unlikely for teenagers. Not to mention many hours of tech support. It's therotically possible, but in reality it's unlikely.

Alternatively, I'm discussing a tech savvy teen creating something that takes maybe an hour to setup and it spreading via word of mouth, which seems pretty likely.

I agree it makes sense to monitor internet activity to an extent, I just don't know to what extent. being able to look up the stuff I was able to look up in the 90s was incredibly useful to my development, even if it would not have been allowed. I might monitor, reluctantly and mainly for certain keywords, but mostly I would want to foster trust and responsibility.