Actually, Gori is incorrect. One does not have to be a journalistic enterprise. Freedom of speech attaches to everyone. However, private companies may limit or suppress speech, which Facebook and Twitter did so.
nope, facebook does not get to claim this. when you are operating at behest of government, which they've publicly stated more than once + has been further backed by evidence, you are an agent of the government in the context of those actions. us gov't is not (legally) allowed to bypass 1st amendment protections (or any other) by using 3rd party agents to do so on their behalf.
twitter, youtube, and many others could reasonably have unjust enrichment/breach claims put against them for vague tos that can be demonstrably shown to be unfair treatment between users (for example, penalizing individual channels for the exact same footage that mainstream media uses, placing age restrictions or outright takedowns on only one of them based solely on that footage). however, unlike facebook's openly admitting they listened to government for which information to suppress, youtube's unethical conduct is not obviously a first amendment violation and is more of a tort claim.
Trump's Social Media is suppressing my 1st Amendment rights by banning me. Lock him up!
using equal basis, they will lock him up along with you. in order to maximize the suffering, neither of you will be allowed to physically do anything to each other, nor have access to any means to prevent hearing the other one speak/make noise. one might very reasonably claim this is cruel and unusual punishment, but since gov't apparently doesn't care about constitutional rights, what's one more?
The press can therefore ignore something without suppressing it.
not entirely true; the press is not a single person. news organizations can, and do, influence which stories are presented. they can, and do, punish employees who dissent, even if the information presented is accurate. case by case whether that's justified, obviously, but it's core to their model and thus can also be corrupted.