I agree. You could already sort see the embryonic beginnings of the internet in the 1960s with academic computers being networked together, as well as the emergence of government and defense computer networks, like ARPAnet and NASA's Deep Space Tracking Network. Once that happens, the internet or something like it is probably inevitable.
Arpa and DARPA are the Internet .. I first got on the net in 86 with my Amiga via bbs access and later via amigaux and amitcp ...
There were earlier solutions and ideas I think from magnificent or someone that was delivered to your tv during he 70's
The real thing was the late 80s were an age of convergence .. Technology and computers were improving quickly .. Networking was always key in business .. Only natural to extend this ..
The thing that made it cool for the masses was the World Wide Web and all of those compuserve, prodigy, aol cd's that flooded mailboxes ... There was no pressing need for the Internet ... Media made one .. People got on board .. The web exploded and hide all the back stuff in a nice neat easy to use interface ..
I think you would get something similar no matter what once you connect the first two computers together it's only a matter of time and scale and bandwidth..
You want to kill it.. A virus that is unstoppable would work.. Avoid the multimedia leave it more the domain of email and text based tools like Lynx, gopher, ftp, mail, Usenet, and Unix operating systems and I think you will find it not so popular