I second your motion. Initially I thought that they found a new material that is sensitive to 2.4GHz electromagnetic waves. This train of thought was inspired by the ability of cameras today to capture infrared light. [The old point remote at camera trick].
The title of the original article is "Invisible WiFi Signals Caught on Camera." I thought "Invisible" was too Ripley's-Believe-It-Or-Not-sounding so I removed it while trying to keep as much of the original title as possible intact. Probably a better title would have been "WiFi Signal Strength Caught on Camera" or the one you proposed, but, whats done is done.
I think the title of the original was being criticized (righly), not the title you chose for the HN post.
How about "Cancer risk of your children visualized" ???