I'm surprised by how it looks like an exact replica of snapchat. Seems like a desperate attempt by Facebook!
[1] http://www.insanelymac.com/forum/topic/317290-filevault-2/
As far as I know, OS X asks for permission for diagnostic data collection on first boot and can be turned off anytime. Unlike Windows, on OS X the data collected is not stored encrypted and can be inspected. They are not equivalent.
What I really don't like however is Microsoft pushing garbage like candy crush to my machine without my consent.