i think going social and "asymmetrical" is the way to go. think twitter. their subscription system does not obligate you to follow people following you. this i

i think going social and "asymmetrical" is the way to go. think twitter. their subscription system does not obligate you to follow people following you. this is the key to good content filtering. of course we can keep a "public timeline" (for new users which don't know where to begin)