The problem is that we have 'server' machines and a system which requires 'root' access to do certain things. We'd love to know who on the operations staff did something on the server (a workaround is to set an environment variable but which works in the 'normal' case but fails if someone is being a bad actor). So you train it up across the org, and then when ever you have a session where the signal from the type sig doesn't match the logged in UID, you alert it (or log it). SO instead of 'root just changed the date to last year' you get 'Chuck just changed the date to last year'. That would be a very very very useful tool to have in one's toolbox.