Dark matter is not made out of the same material as ordinary matter—it’s not composed of atoms or the familiar elementary particles that do interact with light, which is essential to everything we can see.
That's a pretty big claim right there: "dark" isn't an adjective that describes the matter, the dark matter has an entirely different structure than regular matter -- there are no dark quarks, electrons, protons, neutrons, atoms or molecules. There is no dark Gus reading a book.
We cannot take regular matter, "darken" it, pass through some object undetected (a nice wall, perhaps), and the "undarken" the matter. There will be no burglars using this to steal the Crown Jewels of England.
Clearly, she would know more than I do, but it's a very bold claim to make with such certainty for something that we can only detect from gravitational effects at a large scale.
