https://www.cnet.com/news/googles-new-ad-settings-shows-how-dumb-targeted-ads-still-are/

I'm as scared as anybody that all of my oh-so-personal data is being turned into a giant dossier that'll help companies and governments target me in all kinds of seminefarious ways. Shadow profiles and the like. 

But if Google's just revamped Ad Settings tool is any indication, those potentially privacy-penetrating algorithms are still pretty dumb.