While I think some careful regulation is required, I don't see how it would be legal to ban Twitter, nor possible for Twitter to entirely eliminate bots. But I

While I think some careful regulation is required, I don't see how it would be legal to ban Twitter, nor possible for Twitter to entirely eliminate bots. But I think regulation could provide some carrots and sticks to encourage platforms like Twitter to be better at spotting and responding to these campaigns. Right now there's not enough incentive for them to invest much in combating bots, when their incentives are overwhelmingly to drive engagement (and advertising dollars).