If a person doesn't want to give them personal things better not use any of those networks or use them scarcely. But, alternatives are pretty much underdeveloped especially for companies, shops and similar. Most of the local small shops communicate with customers over Facebook pages even when they have hosted websites. It gives them bigger exposure. Business console on Facebook is bloated, and too cumbersome in my opinion.

Giant floating island to stay in temperate zone, of course everyone would suffer sea sickness and it is question how would we keep everything in place.