I would not be opposed to this being a server wide rule in the context of regional communities - it avoids political editorializing, and probably creates a rule uniformity in that context. However, rather than making it site-wide, I'd instead approach those moderators (like myself in Winnipeg), and say: "hey, this is how we'd like the regional communities moderated" and I'll happily assent and apply those rules fairly, 99% of the time ;)

But for topic oriented communities... The most basic example is to edit the title to remove jargon. Jargon is great if you're a scientist and already know the jargon, but to appeal more widely, you want to tone that down. And often you need the title to be modified to reflect the direct relevance to the community. Sure, you can make a note in the attached text blurb, but that often lands below the cut, or doesn't get read.

Another example: !geologycareers, for example, assuming it becomes a landing place for r/geologycareers eventually (I moderate that one on reddit), when someone posts a job opening, they will almost always need to modify the title to include the regional relevance.

In !printSF, if someone is posting a book sale on Amazon and linking to the page directly, the fact that it's a sale is not part of the title. The title should read something like: "[Canada/US] Book one of Foobar's Series is discounted to $1.99 right now." even if directly linking to the book on amazon.

As a more extreme example: In !spacemusic, pretty much all titles are edited to fit the form Track by Artist (or similar) -- because that's the form.

So basically, the more the community is topic oriented rather than regionally oriented, the more the title needs to be "BLUF" -- Bottom Line Up Front.

I would probably relocate some of these topic oriented communities to other servers and try to establish them there if this rule was instance wide.