Ok, before this LED topic came about, we didnt have too many concerns about robot shut-off safety. Most robots are fine as they are. As long as you can disable a bot in practice, you wont need 10 foot long poles... The LED is a good idea, but wont account for all safety problems. I think we should just keep with the good old fasioned removable link and maybe LED for now.
(Has this topic been resolved yet?)