I've been reading the theoretical papers on Wi-Fi as a tracking system (https://publikationen.bibliothek.kit.edu/1000185756) but dang now Comcast is actually selling this?!?! And people believe this is a good idea?!?

Here's an article that explains it in a way more understandable for f&f: https://www.core77.com/posts/145192/How-Wi-Fi-Can-Track-Your...

Wonder if Flock is starting a wifi router business...

Please don't editorialize the titles. Use the one used by the piece you're linking to unless it doesn't fit or is clickbait.