For me, I really don't care. However with the latest two MacOSX apple does give one some leeway of opting out of some data.
It would be naive for me to believe that everything posted on the internet is safe from data mining, including what I am typing now. I guess a good concept to hammer into kids heads would be, don't put anything on the internet, search any site you don't want to be associated with. that nothing,even if it is purged, it is located somewhere.
Mom used to tell me "nothing in life is free. If it sounds too good to be true, it probably is." When we pay nothing for Twitter, Facebook, etc.... don't assume that the service is given without some cost, even if it mines your data.
Now I need to go to bed, That black van across the street with the two guys in it must be tired staring over hear. I think one is named Boris, and the other is Natasha..