Problem number one: Who gets to comment on taxpayer-financed USGov social media? Citizens, immigrants, foreign nationals? And if you limit it to citizens, well

Problem number one: Who gets to comment on taxpayer-financed USGov social media? Citizens, immigrants, foreign nationals? And if you limit it to citizens, well you have to verify so it'd be linked to you social security, IRS, driver's license or some such. Does only the government get to see that information or is your account completely de-anonymized? Problem number two: It'd have to be completely open-source code with transparent moderation, no behind-the-scenes games of amplifying, deamplifying, front-page access control, etc., as that's manipulation of free speech. If there were mechanisms for forming groups, you couldn't, say, ban neo-Nazi groups as that's an infringement of US free speech laws. A lot of people would protest, saying they don't want their tax dollars going to provide a platform for groups they dislike to congregate on. Problem three: if social media is a public service like roads, electricity, water, or broadband (generally all nationalized services in more rational countries than the USA), you can't just cut people off because you don't like their views and opinions, no matter how unpleasant they are. If what they're saying or sharing is not explicitly illegal (and that's a relatively high bar, I think immediate incitement to violence is about it for speech, plus the usual video and image laws on child abuse etc.), how would you go about doing moderation or banning accounts? I suppose a citizens/registered-immigrants-only non-anonymous government social media site running with completely transparent moderation (maybe users could democratically vote for moderators?) on a open-source platform would be somewhat interesting as people might self-moderate more, who knows?