Elon Musk's takeover of X is already a good example of what happens with unlimited free speech and unlimited reach.

Neo-nazis and white nationalists went from their 3-4 replies per thread forums, 4chan posts, and Telegram channels, to now regularly reaching millions of people and getting tens of thousands of likes.

As a Danish person I remember how American media in the 2010s and early 2020s used to shame Denmark for being very right-wing on immigration. The average US immigration politics thread on X is worse than anything I have ever seen in Danish political discussions.