I wouldn't be surprised by this myself, but the main actors in astroturfing are usually states and corporations through bots and paid shills, not normal users.

I wouldn't be surprised by this myself, but the main actors in astroturfing are usually states and corporations through bots and paid shills, not normal users. So, if you were being serious about stopping things like that you would be specifically going after bots and shills, not opinions. That's a huge distinction to be made that I don't think you're properly addressing.