They have the job of turning off my accounts.
Dozens of systems.
I had root on many of them.
My auth key is sprinkled around like fairy dust.
Plus I have access to MANY production accounts with non-expiring passwords.
Plus when I helped new people on a system, I would drop my auth key in their file so I could login in as them and test.
Plus I had permission to create a couple of SETUID programs that spawned shells as emergency back-doors when we could not get an admin. Of course, I don't remember what they are - a find command should get them. I hope.