My opinion (and that seems to be that of many) is that targeted advertising is not desirable. Neither from a user perspective (I don't want to give my data to a FANG company) nor from a society perspective.

It opens up the flood gates for misuse like the CA case and it doesn't make the world a better place. And it's not only that isolated case, it's FB's own behavior - things like scraping and cross referencing Bluetooth network and contact information. It's a recipe for disaster.

Find a better business model.