A good start. From 2024: "A company allegedly tracked people’s visits to nearly 600 Planned Parenthood locations across 48 states and provided that data for one of the largest anti-abortion ad campaigns in the nation, according to an investigation" - https://www.politico.com/news/2024/02/13/planned-parenthood-...
It gets so awful. Here's one of the worst I remember, 2019: https://www.nbcnews.com/news/us-news/missouri-health-directo...
And that's pretty much the most benign use case too.