The best way to fuck a democratic process up is making votes public. No one should feel like there's a "deterrent" to voting. All that does is create incentive to reward/punish people for how they vote.

Voting is what fuels the content aggregation, too. It is a very bad idea to deter people from voting how they please because it strangles the algorithm of the data it needs to sort the content. You want people voting, a lot. That's what makes the whole thing work.

Edit: which is to say nothing of how bad it will get when people make tools that help automate retaliation for downvotes. You can potentially state an opinion in a comment and set up a bot to auto block every downvoter, then share that list publicly. You may think that sounds like a great system for weeding out hate but I promise you it's going to be far messier than that, and more importantly, this kind of retaliatory shit hurts the aggregation even more.