Karma may feed into the inherent immaturity of a few in the community that prefer censorship to actually dialogue and honest discussion. If a poster is regularly
abusive as to require moderation then official removal is the only solution instead of getting nicked with tiny anonymous cuts. People's standards as to what requires censorship and banishment is very uneven (there is no standard) and really relates to how sensitive the readers are about their equipment and the POVs they hold and defend - sometimes it is just sensitivity to any outsider holding a differing opinion.
I think a well stated, actionable response to a posting you don't like ( not a return slam) is much better feedback to potentially change behavior than a super secret electronic rating...but that is me. I like it open, clear and to the point. If that doesn't work and it is a real community problem not a "onesie" - then it is up to Craig and Co. to block. That is what I prefer, but then I am only a chronic lurker.
That said, it be good to wait a tad on the return of the Karma II, THE RECKONING
, until the 5D III frenzy subsidies, people learn to use the camera or return it and the flood of new posters with perhaps questionable motivations leave and we can get back to just being vigilant with dark lords at Nikon.