I've read that Mars could retain an Earth-like atmosphere because, while it's stripped away by the solar wind, it would happen over tens of millions of years; any remotely plausible terraforming attempt would be able to replenish it much faster than that.
Something else that occurred to me. If someone posted something that was pro-woke in /r/conservative or on Parler or any of those other apps, they'd get banned immediately. "Free Speech" only seems to be a concern when it's right-wingers posting on left-leaning forums, never the reverse.
I think that taking the free speech argument at face value in the present day just means you're gullible.
The problem is that by that point it will have grown beyond manageability. You know the "Nazi bar" saying.
There's a bunch of people (who are Nazis) and they seem cool, quiet, well spoken, just having a drink. And they bring their friends and those guys are cool too. Then those guys bring their friends and those guys are less cool and now normal people don't drink at the bar anymore and you look around and it's a Nazi bar and you can't make them leave or they'll start causing "problems". So. I'm all for just using the brutal hammer of censorship.
It's not a free speech platform and no one ever said it was.