What if we don't assume every vote is equal. What about weighting a user's vote by some factor of their karma? And/or capping the threshold that a user can vote. i.e A user with 0 karma can vote on comments with 0-3 points. A person with 100 karma can vote on comments -3-6 points. A person with 500 karma can vote on comments -9-9 points, etc... This implies that a comment with ridiculous votes (either positive or negative) has been decided by members of the community that the community has already shown approval for.