In its simplest form the internet is just a bunch of computers connected to each other. So, if you are looking for a place where people can express themselves

In its simplest form the internet is just a bunch of computers connected to each other. So, if you are looking for a place where people can express themselves without the fear of repercussions, all you need is anonymity. You don't need something to replace the internet for that, just a sub space where people can't have their writings/ideas/creations tied to their real identity.