I don't, but then I rely on it to pay my rent, so changes tend to be fine by me. Up to a point. That point being where I can't figure out how to fix what I broke.
I mean when I am installing updates or increasing drive sizes or things of that nature I'd not like people on the server. It's a terminal server. The others don't get logged on other than by me.
I'd like to block everything but printing really until I'm done working on it, but I suppose shares would be ok. The problem with that is if someone has a doc or spreadsheet open and I reboot the server they will panic and close it and lose their work.
There should be a maintenance mode like there is in Esxi.