He makes some sober, and frankly dull points on the legal/ policy front ( though the prospect of "the Aliens" having First Contact with ISIS or Kim Jong Un is
This author has argued elsewhere that the artificial signal that we first detect may more likely derive from within our own Solar System than from a source outside of it.
Given the widespread of times and possible locations of the origin of life, Gertz thinks that it is plausible that an ETI seeded the galaxy with passive probes that would wait (in shelter) for development of (technological) life within their area, and then initiate communications. If, for our putative ETs, interstellar travel proved impossible for some reason, they might at least have contact with later intelligences by scattering probes around the galaxy which every so-often would "wake up", sample their area for interesting signals, and go back to sleep again for a few generations.
All very "Monolith" (Arthur C. Clarke SF story, later made into several films). But what if a probe hibernating around Sedna were to wake up to I love Lucy? It's response (indeed, it's body) could on the way today, and arrive next week at a DPRK listening post — who choose to reply in secret. To what effect? What could the nuclear power of DPRK do with an alien version of Encyclopedia Galactica 54321 — in comparison to our Encyclopedia 2000?
Gertz raises some probably important policy points, but some really fascinating ideas.