Horrific. If anyone on HN uses or works with adtech you should think about the consequences of what you are building. It's only ever gotten worse. You have a social obligation to stop.
The article is there to raise awareness about the problems in the advertising industry, and one effect is that no one can claim they didn't know.
We should all consider the consequences of what we work on shouldn't we?
The fact that other people don't isn't a counter argument...