Very interesting. Thanks y'all.
To expand a bit, I'm looking at commenting and moderating systems that may exist outside of a blog or forum - in particular mobile apps. In a native experience, we don't have the benefit of an out-of-box solution, and we need to spec out any moderation tools in advance. It's an interesting problem :)
Tools that can delete and hide comments make sense, along with banning users. Even something as simple as warning a user has a lot of gears to it, such as surfacing the warning to the user.
Restricting to authenticated users is definitely huge, both from an engagement and an enforcement perspective.
I'm also pondering things like reporting systems. Do you prefer tools that dump all reported comments into a single queue, which a moderator can act on? Or do you prefer crowdsourced enforcement, where a certain number of downvotes hides a comment? Going into this with the assumption that we will have to enforce our policies, what are the best tools to give those policies teeth without taking up an unnecessary amount of agents' time?