Re: set indexes
Ah, well I did not recognize this particular term "set index" <comet> the more you know
I'm not sure of what would be the benefit of listing these peaks together in a non-disambiguatory "prose" article as they have nothing more in common than the name... and... being... a mountain.
To be as clear/simple AND useful/complete as possible.*
[assuming you are talking about the example given at http://en.wikipedia.org/wiki/Wikipedia:Disambiguation#Set_index_articles ] because [[Signal Mountain]] as a standard style dab page (with that 1 town and 24 mountains) would be almost useless. So they split the mountains out into a specialized-style dab page.
(I would guess. I wasn't involved in the creation of the "set index" idea or Signal Moutain pages...)
like with [[Live]] and the split into [[Live (album)]] or [[Brown (disambiguation)]] and [[List of people with surname Brown]] or [[Olympus]] and [[List of peaks named Olympus]]
* different editors' understanding of what constitutes "usefulness" is where the disagreements tend to arise!
The "remove links that no true scot would click on" principle has worked sooooooo well for disambig pages that it is being experimentally applied to proper articles.[1]
...
[1] http://en.wikipedia.org/w/index.php?title=Switzerland&diff=239558371&... is my favorite. Note that [[Romansch language]] is okay to link to as it's not a "common term.
—C.W.
I really don't think it started with disambig pages! http://en.wikipedia.org/wiki/Wikipedia:ALLWIKI explains the tightrope, now don't link anything superfluous!
Was there a question in there, or were you just venting about the frustrating diversity of subjective opinions held by humans? :)
Quiddity