@TheGibson ... they would back up their work across the network[*] and logoff.

[*] The networking could only transfer files, so remote logins weren't possible. That had the benefit that you could see everyone else who was using the machine.

I always had the machine to myself after that, and I paid others the courtesy of letting people know when I'd be working on it so we could coordinate timings.

It really wasn't my fault, but it remains an interesting story.