Interesting twitter thread: "I'm back from a week at my mom's house and now I'm getting ads for her toothpaste brand, the brand I've been putting in my mouth for a week. We never talked about this brand or googled it or anything like that. As a privacy tech worker, let me explain why this is happening... Here's where it gets truly nuts, though. If my phone is regularly in the same GPS location as another phone, they (data aggregators) take note of that. They start reconstructing the web of people I'm in regular contact with... So. They know my mom's toothpaste. They know I was at my mom's. They know my Twitter. Now I get Twitter ads for mom's toothpaste..." More info in the complete thread: https://twitter.com/RobertGReeve/status/1397032784703655938
