This addon will call ForceQuit() right before you are supposed to be logged out for being Idle. This will return you back to your OS instead of going to the character selection screen and then being dropped back to the login screen. The idea is to avoid running your graphics card at 100% GPU all night when you fall asleep without logging out. It also allows your OS to start its screen saver or power down the monitor (and other hardware devices)
Do you have a SteelSeries World of Warcraft® MMO Gaming Mouse? Does WoW sometimes claim that it can not find your mouse when you log in? This addon tries to solve this problem when it happens by automatically re-enabling the mouse.