The crucial argument for me was that I have to trust Facebook forever. Facebook intends to keep your data forever, so you have to trust them for just as long.

The crucial argument for me was that I have to trust Facebook forever. Facebook intends to keep your data forever, so you have to trust them for just as long. I don't think Facebook will go forever without some major data leak. I don't like to count on the competence of corporations in handling secret information. Similarly, I don't think any human ever looks at Facebook's statistical models for any individual. Facebook likely considers this data of the upmost secrecy. But I'm not sure they'll remain as upstanding decades from now, if they're ever in dire financial straights. In my view, Facebook is only going to get eviler.