Spammers rejoice.

I thought only emails from friends and their friends was actually displayed in your inbox. How would spammer abuse this?

In fact, in one of the news accounts they say they will bounce emails from non-contacts.

> In fact, in one of the news accounts they say they will bounce emails from non-contacts.

Bouncing is an interesting choice. Many/most of the large e-mail providers stopped bouncing several years ago. (Instead, they just drop the message.) Many/most companies do the same thing.

Any idea why facebook went the other way?

Do you have a spammer on your friend list? If not then you shouldn't see spam.