Martinlundp - Correct, Private Mode means nothing is shared in either Facebook or Spotify Social (the ticker in your app).
However, if you adjust your settings in your Preferences there's no need to go into Private Mode all the time.
The Private Mode option is there for users that want to share their tunes 99% of the time. They can use Private Mode when they want to listen to a guilty pleasure for a couple of hours without adjusting all their settings.
raulserrano - What about your Facebook friends? Do you want to share your tunes with them? This can be done via your Prefences Page: Edit > Preferences (in Windows) or Spotify > Preferences (in Mac)
I hate to beat a dead horse, but after all, you could avoid all of these privacy questions by simply allowing a permanent private session option!!!
Ok, so we have covered that by unchecking all of the boxes in the desktop app > preferences > activity sharing section, this will be, in fact, a private session. But then you say that this only applys to this singular device, ie. the desktop.
So, I am on my iPhone app and I go to settings > social, and they do not have these same options... ARGH. Do you see why this keeps coming up! The only options there are the non-permanent Private session switch, and Last.fm/Facebook switches. It says nothing about spotify social (if that is what you call that obnoxious scrolling list in the desktop app that I didn't even know existed because I only used the iPhone app for the first few months that I used spotify).
To make matters worse, there is no way of seeing exactly what I am sharing, because my own items don't show up in the obnoxious scrolling list. To be clear, why can't there be a simple option for those who don't want to share anything, with anybody, at any time? Just because this can be used as social media, doesn't mean that everyone wants it to be...