I think it something should already kick in if you create tracking pixels to read canvas data to identify users or generally work on fingerprinting. Especially if it is for a benign purpose as advertising, an industry that is notoriously toxic and would have no problems selling ever kind of data they get their hands on. It is fine to generalize it that way in my opinion. The directly conflict with any spirit of the law in most countries regarding privacy.

Aside from that, the quantification of attributes/properties of people can have negative implications for many people. Oversharing is a problem on the net, but at least here people just endanger themselves.