A number of our team have Administrator role although months can go by where they don't interact with moodle at all.
A few weeks ago, I went to Site Administration -> Appearance -> Themes -> Theme Selector and chose a new theme thinking that, as with theme / skin selectors on most websites, I was only changing how *I* saw our moodle install.
Of course everybody else quickly noticed the change across all moodle pages on their machines, and I felt rather foolish.
Now someone else did the same thing, and I feel less foolish. Would it be an idea to have a Warning on Theme Selector when accessed from Site Administration saying "Look out, you're changing a setting on the server which will affect how all users see your moodle install" ?