It is hard to argue with critics about school networks that are open. Not open from the standpoint of security but open to the myriad of resources teachers and students can learn from. When students disregard technology etiquette in favor of doing what they want then, perhaps, privileges are lost.
What would it do to students to not have access to online resources?
Maybe nothing. I say this because educators are not fully exploiting the power of learning embedded in the Internet. Students may miss nothing because they aren't using it.
For some students it would be cutting off their arm because they heavily rely on Internet access for research, creativity, and more.
However, students who abuse the power to use and create at their disposal should lose their privilege to access a great sum of humanities knowledge and the power to add to it.
What would restricted access to the Internet do to teachers?
Teachers who use it to engage students in deep learning will have a conniption because their source of information is gone. Out goes email, out goes chat, out goes all kinds of stuff we've come to rely because we can't trust kids to follow rules in place to protect them and us.
The question is: If students continue to abuse an open network, should they lose their privilege to use it?