This isn't about people having their civil liberties taken away.

The social network bans are businesses protecting themselves from people whom threaten their business. Like a fast food restaurant refusing to serve customers who smoke crack in the restaurant.

The platform and infrastructure bans are also businesses protecting themselves but not from people, rather from other businesses. This is on level with U-haul banning drug cartels from renting their trucks.

No one's civil liberties are being taken away