How to disable buttons on lockscreen?


May 28, 2012
There are shortcuts for lockscreen for flashlight (hold Menu) and camera (hold Back).
They are useful, all right.
But I can exit from camera app by pressing Back again, i.e. bypass lockscreen. It won't work with any kind of password enabled, of course, but I don't want to enable password lock.
Now, I also have glitching Back key...
So, how can I disable these shortcuts?

UPD. Ah, yes. Nexus S, if that matters.