Moreover, while the means to the end may be the same, the internet, I don’t believe that the freedom to indulge in wrongful behavior by virtue of secrecy — illustrated in your dissent by child pornographers and terrorists — analogizes well to political partisanship. Among other reasons, the ill effects cited by echo chamber critics focus explicitly on the public effect of such polarization. Insofar as a personal is privately extreme, but apparently moderate in their public life, the problem, as I originally posited it, doesn’t really exist. The same cannot be said for your two examples, rendering them, at best, inapt.