The end result of people following the Munroe idea is an almost perfectly polarized society where everyone who disagrees with the dominant idealogy of a location is ejected.

Almost every internet forum I've been on that allowed politics has in the last ywo decades gone from a lively mix of people of diverse political views debating each other to political monocultures that spend their time talking about how evil and stupid their political opponents are. This results in the inhabitants having basically no understanding of the beliefs, world views and motivations of people outside their bubble and near complete ignorance of any facts that might be evidence for said views.