When someone downvotes you or upvotes you, some prompting should come up in the corner to tell you who did it and you could probably prompt the voter with a little box asking why. This could point out fallacies or great points in someones argument and also reduce hateful downvoters and biased upvoters. If we also know why we have been downvoted (on this site it is for the sake of disagreement and the person doesn't always have a legitimate reason they just want there team to win) we will become better debaters