Because merits likely don't circulate evenly accross the boards, I don't like and won't support a de-merit mechanism that's solely based on post count, like it's proposed here. I don't like the fact that posting is in some way punished. Sure, I understand that good posts with valuable content will likely receive their share of merit to compensate the punishing "carry". But I don't like that boards with low merit circulation for whatever reasons will be overly affected negatively, maybe shutting down lively discussions because of over-amplified "carry".
Spammers already can't rank up so easy because they'll hardly get merit for their shit-posts.
I'm also not so sure about off-loading all burden to moderation, stricter rules, more bans and whatnotelse. Good moderation is done by real people and real people can fail and more important need to have an incentive and time to execute good and fair moderation. How do we want to achieve this?