Logout user script
The Apple event is the most robust way to do it (but it can still be blocked by a stuck app).
Entering the special characters is tricky... here's a block you can use in a script or via ARD.
osascript -e 'ignoring application responses' -e 'tell application "loginwindow" to «event aevtrlgo»' -e end
The « and » characters are typed by option-\ and shift-option-\ respectively.
kAEReallyLogOut) Apple event logs out without showing a confirmation dialog:
tell application "loginwindow" to «event aevtrlgo»
tell application "System Events" to log out sends
kAELogOut) Apple event. The Apple events are listed in