Whether Facebook is an ISP or not isn't material to whether it should be a common carrier. Facebook's social function is as a distributor of broadcast informat

Whether Facebook is an ISP or not isn't material to whether it should be a common carrier. Facebook's social function is as a distributor of broadcast information and carrier of peer-to-peer information for two billion people. Further, network effects mean that Facebook's size makes it a natural monopoly. There is no shortage of historical evidence that unregulated natural monopolies are bad news for everyone except their owners, and, given that Facebook's function is the distribution of information, the natural path for regulation in a free society is a common carrier designation.