The other problem is you can't really trust the bigger subreddits because of astroturfing and too many groups with something to gain. You can't know for sure who's up voting what you see who's down voting what you don't see. Often redditors will accept what they read as the rational voice of the people when it could be a corporate attempt to sway public opinion for example.

Honestly there isn't anything reddit can do. Its a side effect of a popular website run by users.