No, the ruling goes out of it's way to say that putting something on the front seat of a car doesn't provide an expectation of privacy. Your home is very different in the eyes of the law. You can't use IR cameras to see into a home already: https://en.wikipedia.org/wiki/Kyllo_v._United_States
Edit: After re-reading, I think you may have a point that Wifi is a commonly-used technology and might technically be allowed. It might depend on whether your phone or wifi router could be used as a detector with the right software. I'd imagine the supreme court might change the standard if that happened though. They generally treat the home as more sacred.
Edit: After re-reading, I think you may have a point that Wifi is a commonly-used technology and might technically be allowed. It might depend on whether your phone or wifi router could be used as a detector with the right software. I'd imagine the supreme court might change the standard if that happened though. They generally treat the home as more sacred.