I agree but to test that hypothesis would require some co-ordination: if the Thargoid incursions were to be met with heavy resistance in just one of these systems, whilst the others were left more or less alone, then in one week we might see the effect: if the systems with little resistance suffer heavy damage but the system where resistance was strong suffers significantly less damage, then that would indicate that these structures are giving targeting orders to the Thargoid forces. If the reverse happens, then the Thargoids might instead be responding to our own hostility and the structures are sending scouts to these systems for other reasons. If none of the systems are attacked, then perhaps the Thargoids were looking for something there - but either did not find it or did not need to use force to accomplish their objective.
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A shame we can't switch off or reprogram the transmitters, or hack the systems at the Thargoid structures to issue ceasefire commands... . (And where are those orders coming from and to what end are they being given? Trying to look at it from the tactical, military perspective, these incursions constitute a probing of our defensive capabilities...)