If you own a business, giving your phone number out is a part of doing business.

I think the rest of the world should buy the subsidized Chinese solar cells, the Chinese government will go bankrupt and the rest of the world will get cheaper, cleaner energy.

China has many barriers preventing other countries from doing business in China. Time to give them the same treatment!

The atmosphere causes almost all meteorites to burn up before hitting the surface, I imagine that the same holds for space debris. So the concern about space debris hitting your house seems to be more about drawing attention to the very real problem of space debris to orbiting satellites.