At this point we need to recognize that these "private companies" are now de facto state actors. They take censorship advice from government agencies (like the CDC), ban certain people in response to political pressures, and hand over user's private data without a warrant. That doesn't mean regulating them like common carries is good or workable, but we need to start by recognizing that there are first amendment clai…
So if you say the sky is green, and NASA says "That's wrong", you call that censorship?
Of course, they're unlikely to behave so blatantly, at least initially. They're more likely to just sort of hint at how anti-trust prosecutions might be started or not depending on whether the platform follows the government's "advice".