Apple functions as a closed ecosystem, not surprisingly the evolution of this ecosystem involves closing off any openings that pose a threat to the core mechanism. When looking at OSX Mountain Lion you will notice a lack of off switches. With the addition of Facebook integration Apple is now Apple to filter feed from Facebook whereby gaining a large customer base who will not be able to leave their ecosystem without losing access to content. It must be stated again that, when you pay for content from iTunes you do not own the music, video or content; you are paying for access to that content. Unless you convert all of your music to MP3 and burn them to CD's you will have nothing if you are not tethered to the Apple ecosystem. When you think the collection of music and video you have paid for stored on your drives is yours, you are incorrect, you must use iTunes to access and make use of that content. The Apple DRM model is strong and only allows a few generations of backup copies to be made before the files are made inaccessible.
If you wish to move away from this model. You can purchase DRM free music and video from: amazon, bleep.com and many others. When you pay for non-DRM content you actually own the files and can do what you wish with them, store them in any way you see fit. If you feel you need to use Spotify do not allow it connect with any outside site; tracking in Spotify is always active and has no off switch.
As for Facebook, it is either on or off.