Comment: You'd be into a billion pages of user generated material

before you knew it. Much of that would be various factions fighting for dominance through sheer volume of submissions. You might have number-of-pages wars to gain territory. Some control of duplication may become necessary. What's to keep someone from posting slightly reworked variations of the same article every few hours?

We all know how annoying it can be to find double posts, each with a different set of comments.

I would perhaps consider demoting a member who in the comments habitually hijacks topics, changing the subject midstream.

Are you visualizing this with a comments section for each article, as the DP has?

We might try to discern what the project will NOT do, before it becomes as complex (and expensive to build) as the human brain!