Crowd-sourced cliff notes--->crowd-sourced editing?

I was just going through my notes and highlights in a book on Kindle -- a frustratingly awkward process, but I won't bore you with an account of this year-old machine's limitations. What struck me was the latent possibilities in an option I never considered: "view popular highlights." Kindles show you what other readers have highlighted, a feature I've always considered an annoyance, like reading a marked-up library book.  But now, on the plus side...