If you have kids at your home, then you are probably aware of this situation - it's nearly impossible to keep them away from fiddling with stuff. And the most attractive toy in the house, is of course, the computer. The computer cabinet, which usually resides below the desk, is the item that is within their reach. Plenty of blinking red and green LEDs and numerous buttons to play with keeps them entertained. Their favorite activity is opening and closing the CD/DVD drive tray repeatedly, and it can drive you mad. Those who have experienced this can understand what I'm talking about.
The CD/DVD Drive Locker was made precisely for this purpose. Just launch the application and select the optical drive(s) you want to lock and they will stop responding to the open/close button. When you need to use the drives, just unlock them from the application's interface or simply close the application.
Update: Link added.