Sometimes when I'm reading reviews on NYT cooking or all recipes, its helpful to be able to read the most liked/helpful comments. ّI find the same is useful on instagram and twitter. I don't know how useful it is on Facebook (I assume they're the ones who invented the 'like' button) as I don't use it.
It would also save reading a whole thread, when you can just read the most liked comments and get the gist of something. Although that could defeat the purpose of a thread that would foster discussion.
What do you think?