Remove projects that are open source but are controlled primarily by profit making corporations like Oracle and Red Hat because it might convince kids to go down the path of developing using that ecosystem.
Block internet access to all sites that are not 100% public domain because the content on those sites might encourage the students to use sites that are not public domain.
We take away all library books that are not public domain yet because it might get them addicted to books that are written in more modern styles with modern storylines and themes, and almost of those books are owned by profit making enterprises.
Discourage any arts, photography, or writing of the student unless that student promises not to show it to others or makes it public domain. Because proprietary individually owned copyright that is granted automatically might encourage other students to create the same, causing mass hysteria.
I'm just running this out to it's logical conclusion.
Interestingly, my computer experience in High school consisted of time on a mainframe and some time on apple II's. I also had some programming time in Basic and even some Pascal. I also extensively used a VMS VAX system in college. I wonder why I am not still using those ecosystems today, outside of a macbook that boots up windows in a VM? Must have been all of that Atari, Atari 800XL and Colecovision equipment I had as a kid. Although full disclaimer, I did play the heck out of Rollercoaster Tycoon and Baldur's gate by atari.