Just a thought , did anybody pass away because a chain support was not fitted?
I would have thought spokes going ten to the dozen would pose a far greater threat 
Nahhh, I reckon most who ride motorcycles climbed up through the push bike ranks first.
Whether upside down or on a stand, with rag in hand cleaning our wheels, who resists the thrill of spinning
them and who hasn't had their fingers banged by spokes in the process
The usual is a lesson
accompanied with a little pain
and not much more.
But you get any part of you fed in between a chain and a sprocket?? as leedo says "it ain't coming back", or growing back!, for that matter.
Brain wave
Lets have a game of truth or dare Ted
Lets put a running bike in gear on a stand. Lets say we both ware gloves.
I will feed my fingers into the spokes, just like a bitt of kids cardboard roarer, just like I have done a multitude of times.
You on the other hand(no pun intended
) you feed your fingers into the unprotected unblocked lower access feed point between the chain and rear sprocket
You have a spare don't you Ted?,,,,,,,,,,,,,,,,,,,,,,,,,,,hand
this is my neighbors hand as a result from a pushy cleaning chain accident when he was nine.
A shredder only shreds when it has something fed into it, but first it needs to be running.
I do think a tear-away lanyard kill switch isn't too much too ask though and I believe it would do a lot to drastically
reduce the risk and scenario of events leading to a screaming engine powered rear chain and sprocket shredder.
Unlikely?
?? yes, but shit can and does occasionally happen
