[tdicola]

No, when you save the credentials of the wifi password locally that solves the problem of having to ask your friend for the password every time you go to their place. There's no need to broadcast the password to every friend to fix that scenario. This is your friend sharing out your credentials to everyone they know automatically--perhaps to people who you don't know or don't want to have the password.

What happens when a jealous ex or stalker that's still a mutual friend suddenly gets access to your wifi network? What about the security implications of MS' servers storing the passwords, and do they disclose whether those passwords can be subpoenaed by law enforcement? This seems like a hornet's nest of nasty privacy and policy issues. It boggles my mind why they think this would be worth doing.

[finnyspade]

It's not only your friends sharing when you don't want it. It's end users that own the router that want to share it. If you put yourself into your grandmother's shoes it may be less mindboggling. Security is all about securing content to the extent to which it is valuable. Many people would argue that their wifi password is not that valuable and therefore not requiring the greatest amount of security. Some people will find this feature convenient. It's for them and clearly not for you. You are no less insecure than you were previously. If you trust the people you give your wifi password to, then there's no issue.