Yes! It's entirely too easy to karma farm by either posting me-too or deeply controversial comments because if people disagree you might get downvoted slightly

Yes! It's entirely too easy to karma farm by either posting me-too or deeply controversial comments because if people disagree you might get downvoted slightly past zero for a given comment, but if you hit a winner you'll get hundreds or even thousands of upvotes. Detecting and blocking every one of those high noise low signal people would really help. At least until they adapt.