What's scary is that Comcast will be using this to spy on people, and that's going to get back to the government and the cops and the new gestapo will also have that. Not to get all conspiracy theory on y'all.

It’s absurd to think they’d do such a thing.

Checking if your phone is attached to their router is much less signal processing!

Haha fair. The current technology is fairly limited and doesn't work through walls, but if we handwave that it will in the future, and if you're living in a an apartment complex and the neighbors have Comcast and you don't, it seems like a bit of more of a problem.

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They already are. Their app advertises an option to determine how many people are in your home via Comcast WiFi right now, not using connections to devices, but radar. I don't think Comcast will stop at just that.

"Xfinity using WiFi signals in your house to detect motion", 500 comments, https://news.ycombinator.com/item?id=44426726#44427986

I may actually wrap myself in tin foil!