That was me, the man in question is not only an inspector but an instructor, ie he trains and asseses other loler inspectors specifically for arb gear. I see no reason to throw out 5yo+ kit on the basis of 1 neglected example out of many thousands out there. the sheath on these strops is easily examined by the climber as part of his pre-climb inspection.
I had a look at my 2003 yale 3m wirecor line today, I managed to expose the core and found that it was NOT rusty. The zinc was intact and although dull looked fine, the wire is still evenly flexible allong its length and I am happy for myself and my employees to continue using it. It will be retired soon due to the poor condition of the sheath however.
As for the broken one in question, here are my observations:
The position of the break is so close to the end of the line that I would suspect the core has been kinked at that point by being chockered onto something and loaded excessively. I can only speculate as to what. The resulting kink ought to have been "feelable" through the sheath. I would be very interested to see the last loler inspection for this peice of kit, any chance of scanning it and posting it up?
Having inspected mine and found no rusting despite its age the rusty condition of the core of this one can only be down to two things, exposure to corrosive chemicals or a change in the manufacturing from bare to galvanised wire. The chap from yale didn't mention this so I suspect its not the case.
I just don't buy the theory that this kind of corrosion could occour under "normal" conditions, mine has been used in the rain, often, it has been put away wet, often, it has been "lost" on jobs and left out in the weather for a week at a time before being stuffed back into its bag. In short it has had a hard life and yet shows nothing like the corrosion on this one.
There is a lot about this one we just don't know, even its owner doesn't know for sure that it has not been used inappropriately by employees while his back is turned. He may have aqquired it second hand for all we know. There is in fact an awful lot about this thing that we don't know and never will.