@Scuzz,
I hear you but I think you are missing my point. My point is simply that online information harvesting is just a more efficient method of what other offline companies have been doing for years.
For example; my mother in law bought us a subscription to a history magazine for Christmas. A few weeks later we started getting stuff in the mail for civil war memorabilia, coin collecting, etc.
You are right that people walk like cattle into these types of harvesters online but my question is, so what? At worst I get ads at least remotely similar to the stuff I "like" and if I don't want to click on them, I don't click on them. I don't get spam as a result of Facebook, just exposure to advertising which is almost unavoidable in modern society.
I can understand finding sites like Facebook pretentious, self aggrandizing and narcissistic, but it has a practical application too as Red has found out.
Anyway, I have contributed already to too much thread hijacking. If you like it fine, if you don't fine.