How did antisparrow army eradicated sparrows? Is it right decision?

Explanation

(1) People started trapping, poisoning and killing sparrows in large numbers.
(2) Several free-fire zones were set up for shooting the sparrows.
(3). People would beat drums to scare the birds from cauding, so the sparrows were forced to keep flying until they dropped dead from fatigue.
(4) Sparrow nets were torn down, eggs were broken and nestlings were killed.