[teleclimber]

> More moderation.

Agreed. However moderation power is something that needs to be considered carefully. I think moderation power should be distributed broadly to the users who have shown good stewardship of the community via their participation, and not to a few chosen individuals.

> Higher barriers of entry.

Yes this is the key. It should take work to occupy mind-space. Your first comments should be shown to very few people, probably experienced users in the community, and their approval or disapproval will determine how much visibility your next comments get.