> I imagine you'd get shot down immediately if you as much as tried to enter the vicinity of a military zone.

Having been detected, yes. Delayed detection begets delayed response. The implication is this craft was not immediately detectable electronically. I don't think any ground-based security force (e.g. some folks standing guard or patrolling in vehicles) are under standing orders to just shoot at something they see in the sky.

If you can get your mini-drone past the radar, you've got a chance at getting some good video and stills and getting your drone back.