Question: How is an enemy drone like a pesky house fly?
Answer: Because you might use similar technology to trap both.
Blogging at Instapundit, Stephen Green links to a report that DARPA is developing flying interceptor drones that use long, sticky, flypaper-like streamers to entangle enemy drones.
That idea is not entirely unlike World War II barrage balloons, the purpose of which was to hold up in the air the long tether cables which would entangle attacking enemy aircraft. Combined, maybe, with a frog’s long sticky tongue snapping out to snag a tasty bug.
N.B., The war between Armenia and Azerbaijan late last year showed ignoring the threat of enemy drones is a losing strategy.