If actual politics reflected sentiment on the internet, US politics would look very different. The Overton window on the internet is very different from real life, there is tremendous bot traffic from outside the US, there are people with multiple accounts, and algorithms and "trust and safety" rules that promote certain views above others. You are confusing signal and noise. The majority of politics - that matter - is not discussed online, the majority of new ideas are not shared/accepted/rejected online - even in a business sense most founders know their cofounders personally, not from online chats. Case rested.
You idea of the town square is also outdated. Do you think the municipal government in Rome still meets at the Forum? And you did not address my point that even if it did exist as it did in whatever millennium you yearn for, would the behavior that is present on the internet be tolerated the same way? Was the Forum or Copley or Dock square known for adult men showing their genitalia to underage women? Your idea of a town square is antiquated and likely would not have tolerated the behavior you think the internet should just because its the town square. Case rested.
> The rest of your post sounds like moral panic.
Nice rebuttal there. If it's just moral panic, why does the data suggest that social media use its detrimental to adolescents' mental health and well being? Why is the effort to curtail social media influence on kids' a bipartisan effort in an increasingly partisan society? Even the misguided level of libertarianism you're probably advocating for understands that short of pure anarchy, there are some externalities governments have to address, chief among them are social media platforms that are evidently harmful to certain parts of society (young kids). Case rested.