I always had impression, that the idea of StackExchange was to let users decide which answers are good, which are bad and express it through up or down votes. But on one of SE sites moderators believe it's their role and their moderation policy is "we delete bad answers". Their definition of "bad" is also quite broad. Is that generally recommended policy on SE?
I've read Jeff Atwood's post on Theory of Moderation, but it's still not very clear to me what kind of answers should moderators delete? (besides the flagged ones).
BTW. deleting without any comment means there is no feedback at all for the poster.
This question is about generic rules for SE community, not discussion on why SU moderators have deleted my answer. Later belongs on SU's meta and is off topic in context of this question.