An small observation I made some days ago.
We do know that the Thargoids get angry if you "steal" something they are about to scoop (ie, using a collector limpet to snatch out an escape pod from their tractor beam). However the other day something different happened to me.
The Thargoid started scooping an escape pod, but I had no collectors, so I tried to catch the pod as it was moving towards the Goid. I failed and destroyed the pod (may its occupant rest in piece). However, the Thargoid became immediatly hostile, exactly the same as if I had stolen the pod.
This changes my perception of their reaction. I used to think that they were yelling "HEEEEEEEEEEEEEEEEEEEEEEEEEY THAT'S MINE!" when they attacked. However, after destroying accidentally the pod, I feel like it yelled "HEEEEEEEEEEEEEEEEEEEEEEEEEY YOU [insert insult here]".
My gut feeling is that the Thargoids do not recognize the human beings inside the Escape Pods as a being itself, but as an integral part of the human machinery. If you think about it, we could describe their ships as "machines made of biological matter", so maybe they are observing our ships as "living beings that include non-biological matter on their bodies".
o7
I've made off with a few pods that made them deploy fighters, but nothing really suggesting they'd attack. Almost as if they were warding me off.