When you're the only person on a server, you can easily type
vcall timelimit 99999
vcall fraglimit 99999
and then leave the server. This leaves the server potentialy running the same map for a very, very long time. The next competant player that visits and spots the vandalism could fix it.
Maybe something similar is already available. When a player leaves the server check to see if there are any other players, If no humans are left then reset the server config to its default.