A brainwashed urge in me attempts to hunt down the origin of the
   unsubscription, and proposes behavioral profiling.
   If the harmful behaviors can be stimulated, patterns that stimulate
   them can be enumerated, and compared to patterns of real world people.
   I'm imagining such evidence would likely lead to the wrong person,
   since so many people share behavioral traits.
   But maybe from that idea could lend a parallel goal of communication.