Quarry for airgun. Not really.
Would I tell others to do it. No.
Would I want to stop others from doing it. No though hsing-ee last paragraph pretty much sums up my feelings.
I will say that my best mate recently got asked by his permission to clear all the pheasants off his land as he's had enough/dispute with the shoot next door with trespassing. So PCP, bipod, sat in the hedge, he was having 5-10 a day. My feelings are that it is wrong, and I wouldn't do it, but it's also legal.
I could never get my head round the fact that people pay in excess of £30 a bird for the privilege of shooting one. Pigeon is far tastier.
Super soaker 3000 (water), nerf fang (foam), noisy cricket (energy), m41a pulse rifle (10x24), Gat gun (.177)