More policy and culture than implementation. Rarely see pages of links to mass media sites on your average phpBB, though.

I have thought for a while that the next “reddit” should be usenet with a client having advanced filtering, local scoring, etc. Maybe where the client reports to/reads from a shared spam database.

I dont mean a chat/conversation-specific community, I mean a collection of communities that are more people interacting than links being posted.

Especially for hobby, parenting, philosophy, politics, technical discussions, etc.

Plant- or algae- derived oils may work better. The key is to not extract hundreds of billions of tons of hydrocarbons that have been sequestered for 100 million years.