or, testing US systems response and it seems they've gotten the answers.
Why hasn't a single agency responded or if they have, said something? another balloon fiasco... let's wait and see what it does, until there is public outcry to question it.
IMO, flying them around with lights is perfect coverage and something someone on the ground might think it's local, Amazon, or not really question it as a threat, blend in with the environment. What if it was a police patrol drone? but I would think they would announce it.
I recall around here when a small drone interfering with the municipal airport was reported, they took swift action to identify and arrest the dumbass that was flying it.