This is how I feel about comment-voting systems and the universal up-vote/down-vote rule. I don't want information hidden from me just because some unknown majority has deemed it to be disagreeable.

I think the perfect comment-voting system would include a feature whereby comments could be filtered and sorted for me based on the up/down/sideways votes of users who I typically trust and agree with (which is based on my own up/down/sideways votes on their comments) and including that user's network of trust, to a diminishing degree.