@email@example.com @colomar @mike @kwnd
I've seen "video surveillence" stickers on shop doors many years ago and I think they were always obligatory. And Facebook is more like someone's shop in the city centre, rather than someone's house.
Also, the network effect. You don't lose contact with your friends by buying milk in a different shop than all your friends. But you do by using a different socnet.
Welcome to your niu world ! We are a cute and loving international community Ｏ(≧▽≦)Ｏ !