Thanks for a thoughtful comment.
"People should welcome downvotes as they do upvotes..."
I think we can agree that anything that costs people money isn't going to be welcomed, except as it adds value. Most folks don't care much for criticism, at least not anywhere near as much as they do money.
"This cannot be solved with code."
I think it can. Code can incentivize any desired behaviour, or disincentivize it.
Thanks!