It's a head scratcher for sure.
If they aren't actively involved, I'm willing to bet they know who is, and based on some of the reports, there seems to be a reasonable assumption that there is at the very least a safety issue relative to shared airspace, if not an actual national security concern.
Which to me at least, begs the question; why isn't more being said/done?
I'm trying to come up with a reasonable explanation and I keep coming back to some commercial grade testing or some hobbiests having a lark.