We were writing out our own thoughts before the internet and also cutting the length down(see graffiti, sms).

Being exposed is not the same as being constantly bombarded with new content. By the way, you're not really being exposed to that differing views as Google, Facebook, etc are putting you inside a bubble filled with things you like.

Moderation is hard when companies are working hard to make you use their tech as much as possible (more looking, more clicking -- more money).