What hypothetical actor wants to be seen, uses a 10+ drones flying for hours at a time, over multiple days?
If you want to probe defense, a single, plausibly deniable consumer / hobby drone would seem far more to the point. If you want to be covert, you wouldn't run lights and would use minimum number to get the job done.
Even if you want to send a message, you'd still want to minimize the chance of being caught, unless you're just absolutely sure you'll get away with it
¯\_(ツ)_/¯
