These days some schools are cracking down on internet. When I was a child, the schools were cracking down on TV. Here is a(n unverified) story:
Parents tell their child “If your Rebbe or Principal asks if we have a TV, just tell him that we don’t have one.”
Next day the kid goes to school and the Principal asks him:
“Do you have a TV at home?”
Kid: “No”
Principal: “Do you have a radio with pictures?”
Kid: “Yes”