I've done the same thing as you and noticed the same effect on the ads shown to me, but when I mentioned my privacy concerns to some friends the other night, mo

I've done the same thing as you and noticed the same effect on the ads shown to me, but when I mentioned my privacy concerns to some friends the other night, most just said "so what, I don't have much of value on Facebook anyway". I think the mass of people (even intelligent people) don't have the same privacy concerns as a lot of the "tech informed" crowd does. We know how valuable the data is and what can be done with it, that makes us much more sensitive to giving it up.