Safety for Who, and from what?
On the few ocassions in my life that I was holding a running chain-saw and either got bopped on the head by a spring-pole, or stung on the bridge of nose by a bald-faced hornet, acompanied by ample re-enforcements, I was quite frankly glad that the the tool was not tied to me.
In both cases, I was to be honest, quite pleased and thankful that the the impliment somehow and miraculously occupied a space quite far removed from my person when I recovered.
I wonder if this thread has something to do with the requirement for knives in cutting contests to have a lanyard?
If so, I wonder that this is driven by the threat of lawsuit brought by spectators possibly injured by a flying knife, as opposed to protecting the wielder?
The ugly reality of the the world that most of us live in aside, it is up to the user, and how he views where he is working--tying a khuk to ones'self has dangers--so might losing the khuk.
Absent the societal considerations of injuries to others first noted, it is everyman for himself, according to circumstance, as some have already noted.
Unless my life depended upon retention of a khuk, I wouldn't tie a potentially out of control khuk to my person.
But that may just be me.