Ironically, the 1st Amendment protects Twitter's ability to block anything that it likes. Fundamentally, the government can't dictate what anybody chooses to p

Ironically, the 1st Amendment protects Twitter's ability to block anything that it likes. Fundamentally, the government can't dictate what anybody chooses to publish (or not) on a website that they own. They can seize it and prosecute the owners if the content is illegal, but they can't force editorial decisions. This whole arrangement drove a lot of traffic to Twitter and helped to keep it relevant; they just didn't want to kill their golden goose.