A few points just off the top of my mind.

• Don't you think this has quite a bit of an overlap with HW?

• I didn't see you specifying your "guidelines" to downvotes. Will it just be on the whims of your appointed curators? Too much possibilities of abuse here imo.

• I did not like the antiabuse project because the curators were anonymous.
  Your downvote curators are going to be using their mains to DV where you will then follow up with your downvote trail?