Earlier quoted context omitted.
> how can we share out most wonderful and beautiful ideas with each other The trick is to create channels with limited audiences, where you can set an expectation of which ideas are acceptable and which are not.* It always has been, but the the arrival of new communication methods has disrupted the traditional channels, and now every idea is propagated to a much larger and looser audience, which aren't aware or don't…
You are describing a structured echo chamber. Or worse an internet of endless safe spaces to get just the view of the world that pleases you. I mean facebook is already doing this, on purpose or not (right now the blame is on the algorithms). Either way this is not the right way forward.
I'd ask you to think how this is any different from anything we had before the internet.
I actually think there is a difference in current communication patterns, but it's not being a structured echo chamber (we already had plenty of those before), and it's not something to be proud of.
The novel effect of social networks is amplifying and concentrating in a single point the worst instances of biased and unsubtle discussion, causing the recipient to burn up from the concentrated heat.
It's a process that replicates the dynamics of lynch mob; at least those were local effects, while now we get to have world-reaching lynch mobs. We need to put up firewalls so that inflammatory speech won't set everything on fire; and structured small communities is as good a solution as any.