[user104658]

Require everyone to use their real name and verify their identity on sign-up. No need for blue ticks, no fake accounts, no bots, far less trolling.

To sign up as a company or organisation, make it that the email address has to be @ the official site.

I'm not generally a fan of the idea of verified ID being required for everything but the initial idea behind Twitter was that people would use their real name and photo... it was never intended to be an anonymous trolling platform but that's what it increasingly is becoming.