
i use flickr and tell ya what... the majority of the world is just getting too "I dont care" as there are so many accounts for so many things that ask for pieces of information. Add them all together and get someones life out of it all...
Much of it is duplicate information. They all ask the same questions. And a lot of it can be conflicting since we don't always fill out our information accurately. The one that is the most troubling is Facebook where they can build a profile of everything you like, don't like, who you relate to, words you choose, stuff you are passionate about, moral values, what triggers you to act on some things and not others, where you go, what you do, when you do things, etc. Compared to that, no other data mining can hold a candle.
But again, the sheer amounts of data are insane and most of it is harmless. I really don't care who knows that I like Quilted Northern Toilet paper or that I eat at Papa Johns every week.