On the mailing list, I mentioned the sign at the start of the 'controversial' path - I'll copy the description I gave on the list here:
On the left side of the sign, there’s a warning icon (exclamation mark), then “No safety rail”, another warning icon (man falling off edge of crumbling cliff), then “Unstable edges”.
On the right side of the sign is the text “End of track, no safety rail beyond this point”.
The sign is there to discourage walkers venturing further south, but it’s not technically a “do not enter” sign.
If we were to use a lifestyle prefix tag, I was thinking of disused, rather then demolished or razed, as there was still a visible path (not actively removed - at least not in the first section that i rechecked).