For all its faults I think facebook is a great tool. My father is not on there but my oldest brother has the same first name as him. My father has not had contact with any of the people he spent time with in the military until just the other day. A guy he went to basic training with remembered him and had no other way to locate him than through facebook. He contacted my brother, so no he didnt get "directly" in contact with him, but he was able to make contact notheless. They havent spoken in over 30 years.
I too have regained contact with some long lost friends "if you call 10 years long lost lol" that I havent heard from since I joined the Army over 10 years ago.
By the way there is a facebook blog that covers the whole stolen image, copywrite infringment, personal information deal. All of the problems have occured with 3rd party software that is not associated with facebook. If you are concerned about your info being used elsewhere, stop using those stupid quizes, games and other crap and just use it to communicate. I find it is a great way to share photos with friends and family when they cannot look at my computer screen as im usually too cheap to print up pictures. It will be especially useful the next couple of weeks as I will be in Germany. I will be able to upload various pictures and immediately my family and friends can see whats happening on my side of the world and live vicariously through me
Sorry about the off topic ranting. In response to the OP: I dont really use those features so I cannot say yea or nay, but others might find it useful and I guess if it becomes a problem you can always disable that feature.