Whenever I see this (http://i.imgur.com/S7SMOTq.png), I get really freaked out. Is this a normal permission? If there is a data breach, does that mean private messages will be out in the wild?
There adding features to the application beyond the typical scope of Facebook API [ie. Publishing]. Unless you are willing to allow access to your account it would be advice to stay away.
Also — does it mean the developers can just browse private Facebook conversations of their users?