It's an interesting argument, but in practical terms, who cares if the government can't censor your tweets when Twitter itself -- an arbitrary, non-transparent entity, with zero representation for users -- can censor your tweets?

It could be a nice first-step to more fair social media, though.

(People are arguing that twitter is not a public forum, it's just a private service, &c. Sure, maybe in origin, but practically speaking, twitter is probably the most important public forum there is right now. Being barred from twitter is a huge loss of ability to participate in civic life.)