The whole feed based "internet town square" concept is flawed, if anyone have seen an actual European town square you would have noticed that it's nothing like Twitter or similar. In a good town square, you have people minding their own business and the public activities are actually curated(a few agendas that fit in the physical location) and people visit those if they they are interested in.

People don't actually participate in 100 different activities all the time and they are very annoyed if someone is trying to grab their attention.

Also, although there are all kind of people at the town square, those who scream "if evolution is real why the monkey in the forest don't become human" are nuisance for those who already went through the evolution theory and know why monkeys are not becoming human still.

Therefore, the whole concept of discovering different kind of people and being exposed to different ideas is not analogous to a feed with christian fundamentalist and atheists screaming to each other because people have different knowledge levels and some are more up to speed than the others on different topics.

A true town square are the forums where you can actually browse topics and participate in those who are at your level. Reddit is a closer analogy to a town square than Twitter.