Fork? More like a dive? If /r/worldnews level 1 gets bad, you just click "go deeper" button. After confirmation, you're now in /r/worldnews level 2 whenever logged in. You don't see comments from level 1 folks, and their votes don't affect the conversation and order int level 2. Same for every subsequent level.
Also allows friends to say "I gawd, this place is terrible. Let's leave it all behind. I'll meet you in level 22?" They then hold hands and take the irreversible plunge into the unknown ;)
How would friends coordinate their simultaneous exit without being observed by the people they want to leave behind? Would you allow more than one group of friends to leave the same level, or do they first have to migrate to level 2, then immediately to level 3?
Also allows friends to say "I gawd, this place is terrible. Let's leave it all behind. I'll meet you in level 22?" They then hold hands and take the irreversible plunge into the unknown ;)