Besides, what happens when you have two nodes, -10 and -15? Sorting doesn't tell you the useful parts
I still wonder why posts with that type of rep don't simply get auto-deleted, since they are likely useless. But, if those two posts are part of 7, the sort would put them on the bottom.
Basically reputation is a means of communicating to the user, and it is hidden. There is an entire structure dedicated towards maintaining that repuation, but it's primary informative usage has been cut off.
Agreed. Yet knowing the rep could be harmful. Although, I don't think knowing the actual rep number is so useful. I see plently of posts with a rep of 2 which are great, and some at 20 which I don't think are any better. So, what is there to do? I would suggest adding the sort feature to each page (it is already in the User Settings), deleting posts of -10 (or less) automatically, and maybe even some pretty little icons representing a 'range' of rep next to the posts title. For example, 0-2 have nothing, 3-9 have a star, 10-19 have two stars, 20-29 have three, etc... all -- nodes would have a big unhappy face next to them. Or a image of Mr. Yuk.