Guideable solid fuel rocket???
Something as small as a drone, 30,000 feet up, would be terribly hard to see wouldn’t it? As well as not being able to get very good pictures of the ground?
If closer, how about flying a kite into it?
I like the idea of using old technology to thwart overflights by these intruders...
The Brits had it right idea during the Blitz back in the day...
Just tie up a bunch of balloons with lightweight cables or even heavy fishing tackle line...
Should do the trick...
Then all you guys with the heavy artillery can save a little ammo in the mean time...
Just a thought...;-)
Kites only go downwind...