An online forums consist of a board and lots of topics. What would an offline version look like?
What if we do it in pen and paper. To start a new topic, you get an empty journal with a wide spine. You write the topic on the spine, then you place the book on a vertical shelf.
Books on the top are the most recently written on, and books on the bottom are the older ones.
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You could place such system anywhere on libraries, toilets, cafes. etc...
Oh, and best of all, it can survive without the internet.-- mofosyne, Jun 08 2015 Howabout those old continuous-feed loop-towels occasionally found in 2nd rate gas station toilets?-- RayfordSteele, Jun 08 2015 and the blue crayon from where the guards censored different elements depedning on the institutions we are all in-- oneoffdave, Jun 09 2015 random, halfbakery