I am a software engineer at Facebook. Bear with me because I don't have any PR-quality answer to give you. I am not on the platform team, but I have built apps before in the wild-west days.<p>The app requires explicit permission from the user in order to post activities automatically. The idea, if you watched Mark's presentation, is called "frictionless sharing." A lot of people don't share because it's another step, but if they could install an app like the Washington Post Reader (a great app--even Mark has it installed), they are happy with sharing articles they've read with their friends.<p>I understand you might be concerned, for example if you added that app without realizing that it will post content. If you are concerned about the privacy implications, you can always change individual permissions for an app by going to your account settings, then selecting the 'app' tab on the left, or by going to <a href="https://www.facebook.com/settings?tab=applications" rel="nofollow">https://www.facebook.com/settings?tab=applications</a>. If you are concerned about spamming your friends' news feeds, that's why we built ticker, for the light-weight activities like "watched a movie" or "listened to a song" or "read an article".<p>If I remember correctly, the exact wording of the app permission request was alarming enough to get my full attention ("I, the application, can post as you" or something like that), so I'm worried less about a user missing that part. In my known experiences, the app was installed with the knowledge that it will share your experiences--because the idea is you want to share your activities with your friends. As soon as I read an article, my first action is to either send the link to specific people who are interested, or post it on my wall if I think everyone is interested.<p>We operate under the assumption that users will not do what they don't want to do, as long as we make it explicit what might happen. And if they make a mistake, they can always go change their settings. So I'm not so worried about users who sign up for the Washington Post Reader app, which is marketed as a social reading experiment, and subsequently complain that it shares your read articles.<p>You might still be concerned, in which case, please let me know why (users being misinformed?), and I'll try to pass it onto the platform folks, who were really heads-down the past few months.