[cryptonector]

Sure, but so there is in FB. On Reddit you can have multiple accounts (all pseudonymous) and you can participate on whichever subreddits you like. If there's some sub that isn't too welcoming of your views, chances are there is another that is -- an echo chamber if you want it thus, sure, but no worse than FB.

[wyclif]

You can also have multiple accounts and pseudonymous accounts on FB. Sure, I think it's against their TOS (unlike Reddit) but I see people doing it.

[cryptonector]

It's a pain, so few do it.