I'm amazed about the mood on this StackExchange site. Where people are so nervous and use down-votes as a gun. I wonder if some tuning shouldn't be made to the logic of down-votes.
I'm just skepict about the fact that this site will allow non-main stream (but correct) thoughts on a subject to rise as the "right answer".
If that's your issue than your problem isn't much about downvoting. It's also about failure to upvote certain answers.
Democracy isn't a perfect system but it's the best we have. If you want more answers that go against the general consensus write some well sourced answers. Try to convince some people who are able to write a well sourced defense of contrarian positions to come and visit this website.
Vote up contrarian answers that are well sourced.