10 base 2 network
As it was called, was indeed a horrific protocol.
Many moons ago, our boss was adamant the whole team (10 dudes) would go to lunch together. Statistically, this is impossible as you'll always end up with one blocking all others and still "doing something quick".
How to solve this ? Easy, you have 10 base 2 network: he'd just unplug his workstation cable, causing all NFS mounted workstations to insta-freeze !
Everyone would be forced to go lunch, LOL.