Facebook’s new “seamless sharing” apps are causing a stir as more users are unintentionally subscribing to them. When you click on a Ticker item to read the story a friend has shared, Facebook asks you to add the app to continue. The apps request permission to “add app activity” to your profile, which means that it can publish the stories you’ve read. If you don’t want your reading activity published to your network, choose “Only Me” from the drop-down menu.”]