You're making a category error. Sprint is a Common Carrier and protected by law as long as they don't meddle with what traverses their equipment nor deny David

You're making a category error. Sprint is a Common Carrier and protected by law as long as they don't meddle with what traverses their equipment nor deny David Duke his phone number. If FB did retreat to common carrier, they would not be allowed to run ads nor ban accounts. If they became content providers they would incur civil and criminal liability for content posted on their sites, but also have complete control over who is allowed to have an account and who isn't. It used to be one or the other, but FB et al wanted to have their cake and have it too, and Section 230 of the CDA was created to allow them to straddle this fence. Well, here we are and it turns out that content is a bigger problem than Section 230 was built to deal with.