Feature suggestion - a little background watchdog routine driven off hardware interrupt like you get in mobile phone to check that the OS is till functioning roughly OK and mute the outs and force a reboot if it aint.
At least then I wont have to run around like a headless chicken in a state of panic trying to locate and kill the volume in near dark
Happened to me the other day when I had the levels quite high and despite having a limiter and feedback destroyer inline - it still made my ears ring a bit.