[namlem]

To clarify, I belive that the marketplace of ideas is still a useful principle, and I absolutely am worried about censorship in certain domains. However, like any market, the marketplace of ideas is vulnerable to market failures. The idea that everywhere should be a marketplace of ideas is deeply unwise in my view. There should be areas where people can discuss any ideas freely, but I think it is foolish to deny the idea that information can be dangerous in some contexts. Look no further than the needless deaths caused by anti-vaxx conspiracy theories. To have a healthy marketplace for ideas, you need some degree of structure.