Advertising is brainwashing, it is the art of thought manipulation.

Right now it is heavily focused on consumerism.

Facebook has already shown it is can easily identify depression, radicalization, political associations, and other "aberrant" behaviours.

I do not trust Mark Zuckerberg as an individual, nor FB as a company to fill that role in society.

You are being manipulated constantly, 24/7. By your friends, co-workers, family, acquitances, movies, songs, books, by yourself. This isn't really a valid reason, IMO.