Edit: whoever is downvoting this comment should check the definition of "irony"
A better title would have been, "Are you sick of being downvoted for having a different opinion? Try ______." Ideally, this would have been a direct link to your site. At a minimum, the URL for it should have been included in the submission text. Having us click through to your user profile == bad usability!
That said, the blame does not fall squarely on your shoulders. There's some definite mob mentality going on here that is embarrassing for a community supposedly composed of free-thinking hacker-entrepreneurs.
I meant that on the social news site that I'm working on there are no posts about downvotes, because everybody is free to express their opinion with up and down votes as they wish and it doesn't hurt anybody.
Edit: Another solution would be to ask people to explain when they downvote. Please, what's wrong with THIS comment?
Compare it to the solution where there's a recommendation system that helps everybody involved: the ones downvoting the posts will form one cluster, the ones upvoting them will be in another. People that like stories like that will see more, people that do not will be spared from them.
edit: i posted this in feature requests thread