Servers defederating because of viagra/nigerian prince/etc. spam is one thing. A "lefty politics" server defederating with a "righty politics" server or vice-versa because they just want an echo chamber? Sure, you do you. General-purpose defederating other general-purpose servers because of "misinformation" and "trolling", when those terms basically mean "disagreeing with the current mainstream narrative on any controversial issue"? That's absurd. The generally-accepted issue with social media was for years that it created echo chambers. Now people are trying to use mastodon to create even more powerful echo chambers.