@BradRubenstein @briankrebs Yeah, so does Google. Been doing it since at least 2011. It's part of Location Services, meant to supplement GPS. Fortunately you can use the same opt-out.

https://www.tomshardware.com/news/Google-Maps-Wi-Fi-Location-SSID,14000.html

Should have seen the chaos it caused for me in google maps when I moved home and took my router with me...