Rational argument doesn't scale, bots and memes scale. Blocklists do scale, and it's only because identity platforms (fb, twitter) are also locked down content control platforms that we haven't seen more global blocklists.

I fully expect decentralised social behaviour blocklists to emerge in the near future. Who would want to (employ/socialise with/do business with) a (trumptard/libtard)? Why take the risk of employing someone with racist tendencies, etc.

It might even use a distributed cryptographic ledger.