Anyone who says that "Twitter is a private company that can refuse anyone" has never ran an actual company. There are plenty of rules against companies discriminating. That argument is the same argument used by Democrats against the landmark Civil Rights Act of 1964 which a Republican majority congress passed (82% of republicans voted yes).
Remember when this forum was up in arms about NET NEUTRALITY? Remember when the big bad ISP was going to censor you? Remember when all the sites went black because thats what the ISPs would do? Now the sites that went black are all committing the censoring. All the sites that went black track every movement you make online. Who needs DNS when you have outgoing link tracking and like buttons on every page.
Social media is about to be regulated. Its about time.