I was reading them, and I think it can be done, there will be a lot of resistance but when it is done by a front end then that front end is going to end up with the most users. A system that also has the curation attached would be very useful.
I think it is important, because people are always going to find old stuff that appeals to them and want to vote on it. I know it happens, simply because it happened to me in finding that story that was already paid out.
We are always going to run into accounts that we have not crossed paths with before, some of them may be right up our alley of what we are currently interested in, and being who and what we are we are going to want to pass that thank you vote for the content.