Disclaimer: I am a novice builder/pilot with a morbid fear of my flying-chainsaw hurting people. Not being able to stop the motors in an emergency scares me more than damaging the copter in a forced landing...
I don't fly extreme distances or FPV out of line of sight, so I have my failsafe (i.e. transmitter fail, craft thrashing around on the ground, heading uncontrolled for a crowd of people etc) set as a "Kill Switch". Throttle to zero, AH off (and if I could - disarm the motors). I run a Hitech Aurora 9 TX - real easy to setup a failsafe on the receiver (just press the button, set the TX controls to where you want them and wait a few seconds).
Charles.