Implementing these suggestions would limit the use of the information and thus limit the spread. Zuckerberg doesn't want people to make the choice on whether t

Implementing these suggestions would limit the use of the information and thus limit the spread. Zuckerberg doesn't want people to make the choice on whether to share their data because he knows that most will decline, which limits the amount of data that can be shared with the world (and advertisers/3rd party apps). It's much easier to make it the default and let a few people complain. The problem is, there's a limit that will eventually be reached where a lot of people complain and here we are.