> You are not "handing" them anything with an expectation of reciprocity, you (in most cases) willingly give up information about yourself to them in exchange f

> You are not "handing" them anything with an expectation of reciprocity, you (in most cases) willingly give up information about yourself to them in exchange for their free service. They don't need an "excuse" - you were as free to say "no" as they are to you. You are not free to say no to facebook. You do not hand your information to them, they take it. There's a reason they buy information from "data brokers", and it's because it include information you are not willingly giving to them.