No advertising is really untargeted. Even billboards tend to carry ads for the type of driver that passes by them and broadcast TV has ads for the type of person that watches that show.

Ads targeted to an individual without that individual's consent should probably be banned. In addition, the law should make it clear that when a company does hold data about individuals, the individual should have some rights to that data including the ability to block the sharing or transfer of that data.

So, when Google buys FitBit, every user of FitBit should have to explicitly opt-in to their data being transferred to Google.