> I can write a system (and have, multiple times) that takes public keys from people in a file named by their users, aggregates them into a single authorized_ke

> I can write a system (and have, multiple times) that takes public keys from people in a file named by their users, aggregates them into a single authorized_keys file, and pushes it to the admin account on all the servers in a list in 5-10 minutes. The modern way to do such a thing would be using ansible, which just as easily allows you to create/delete user accounts. While custom vim settings per user are nice to haves, the biggest benefit is AAA. I'm not sure what type of auditing you can realistically do with, you'd have to trace through machine logs to find the IP of origin for a given pts, and hope that the dhcp server still has.