LSM:
What you are doing is looking at the trees and not the forest.
The senders of these packages are more concerned with reaction to a perceived event than anything else. HOW we react. HOW QUICKLY we react. WHAT is done in reaction, etc.
They'll use different routings in the future for the exact same reason.
In parts of the Infantry it's known as probing the enemies' defenses. First in one area, then another. See how he reacts. And adjust tactics accordingly.
For as evil as these people truly are, they are not stupid.