Remember, people; upvote and downvote based on content quality, NOT personal opinions! Yes, yes, I know, it's very tempting to downvote people you disagree with into oblivion, but that's so not cool to do.
In four words: "Don't be a jerk."
In four more words: "Respect your fellow beings."
When in doubt, consult documents such as the Reddiquette. I'm choosing to avoid making tonnes of fancy rules and the likes, because, in the end, rules can, and will end up being construed in the favour of the crafty, for good or ill.