I went to pandora.com for the first time in years. It immediately started playing a song from a band that I have a fan page for on Facebook. I was not logged into Pandora.

There was the blue Facebook bar on top saying that Pandora is connected with my Facebook. I could click no to disable it.

There is a special service that Pandora, yelp and a few others are using. It is on by default and opt-out.

Not very private if you ask me.