As stated elsewhere, it doesn't matter what someone votes for in terms of curation, as long as it isn't being heavily downvoted. Curation rewards are just for participation. Once you factor in someone's stake, their curation rewards are largely fixed, as long as they bother to vote.
If you don't like this, you'll need more downvoting so curation rewards actually reflect voting in accordance with stakeholder consensus on the best use for rewards. I'm all in favor of that, as you know.
RE: The main excuse for malicious down-voting is "Over-Rewarded Content..." What about the account making $10k+ PER DAY in spam comments?