@JanDvorak: The problem is that SE has chosen a very firm (not only strict, but also irremovable) way to reach its objective.
The q-ban on meta disallow users to try to complain about some injustice happened, and even more it inhibits even the smallest change to the system itself (since of the hurried downvotes of many many users)
Actually, SE reachs effectiveness and quality, yes, but by using drastic, irremovable measure, and often without a possibility to have a fair review of the happening. (if you try you get answered that it's better to be unfair that to be like YA)