It's been said before, but I'll say it again: each individual's votes are theirs to use as they see fit.

You may not agree with anyone's criteria, but that's part of the idea. We each have different reasons for voting the way we do. I have my own reasons for voting, and it's not anyone's business but my own. If you think a node's been downvoted unfairly, upvote it. If enough people agree with you, the node's rep will rise.

As belg4mit pointed out, this has been hashed about over and over. Here's just a few threads to read about:

• Posting "Other Users" on potential personality voters from now on
• Attack of the Downvote Bots
• How I stopped worrying (and learned to love the downvote)

I think the voting and moderation system works just great. It's not perfect, but I don't even know what perfection means in this context.

Update
I just noticed all this strange terminology you're using: "a node's score", "meta-moderation", "karma-oriented". Are you sure you're not confusing the monastery with someplace else?