How about a Warns First
(or Sheriff
) badge for leaving a comment that gets one or more upvotes followed by a down vote 24+ hours later 50 or 100+ times?
I think down voting is great (eh..... wait, that didn't come out right), if it's constructive, and the main way for down voting to be constructive is if it's accompanied by a comment.
The most positive way of doing it, that maximally coddles the neurotically sheltered and thin skinned (and people new to the site) is to leave a comment explaining the problem first, then later, only if the problem remains unfixed, to fire a down vote.
This allows posters to fix their problems and lean without getting sullied and traumatized by down votes. Only the unrepentant are brought to the down vote gallows.