This is exactly what happens on a daily basis. If you post something that is against the beliefs of the masses of HN (even when it's not a troll), you will get flagged and down voted.
The result will be a homogeneous community. I know I will leave eventually because of this. The same thing has happened to the main Reddit.
As far as I can tell, when people complain about being downvoted for expressing an unpopular view, that's usually not what happened. Usually it's that their comment was rude. Occasionally it was just mediocre. Most of the time their position per se wasn't particularly unpopular.
What one ought to do is take one's lumps like everybody else and figure out how to make better comments. The worst thing to do is complain about it. That is guaranteed to earn downvotes, as it should on any site optimizing for signal/noise ratio.
Genuinely unconventional or unpopular comments tend to get downvoted by some and upvoted by others until they come out close to even. The reason for this is that many users, me included, make a point of giving a compensating upvote to posts they feel were treated unfairly, irrespective of whether they agree. Only posts with negative votes attract this kind of fixup, so they end up about even. A corollary is that if your comment stays downvoted, odds are that a fair-minded jury of your peers found it to be rude or be poorly expressed. Another corollary is that genuinely unconventional comments are often easy to overlook, because they're indistinguishable (in rank) from bland ones.
The conclusions are: when downvoted, resist complaining; ask yourself how your comment was rude or could have been better expressed; and when certain that everyone else is wrong, bite your tongue anyway. Just remember what they say about wasting your time and irritating the pig.
The result will be a homogeneous community. I know I will leave eventually because of this. The same thing has happened to the main Reddit.