Dan has pointed out many times why downvote are essential and if they were to ever be removed he would instantaneously set up experiment to prove his point.
Also downvotes of many dollars don't pose the same risk for the downvoters as downvotes equal to a few cents.
The greater the risk you are willing to take the stronger your faith in your opinion and the greater your resulting profit or loss will be. Dan Larimer
Is it true that a whale's downvote is worth much more than a few cents?