Pheasant Shooting

Why is it that the RSPB (which I'm a supporter and member of) doesn't have a position on shooting of birds such as pheasants? I listened to Radio 4 earlier today where I was surprised to hear an RSPB rep in cahoots with a Farmer who organised pheasant shoots on his land. I really don't see how that sits with one of the Society's prime objectives of opposing the 'wanton destruction of birds'.