Zero
Master Black Belt
honestly mostly here we cull. Pigs are a pain to everybody and are fun to kill. Trophies are secondary. Even meat is secondary.
Look I ain't no hippy but you're kind of going into PhotonGuy's crass territory, who I doubt knows the first thing about hunting. Don't get me wrong, I of course enjoy the experience of a hunt or I would not do it. I used to hunt deer and pig and much smaller game but it was always for the meat for the large animals (on my uncle's farm the main purpose was actually eradication but the meat was used and as a by-product trophies, ie antlers, were taken too) and the pelts for the small ones, with the rabbits and possum pelts being sold.
But saying pigs are "fun to kill" sounds kind of sad - both as to yourself and your view on life (in general) and for the pigs.
Maybe you just meant the sheer enjoyment of being out in nature hunting and doing what we used to do before we became supermarket-grazers, fine. I get that feeling too.
But if you are simply finding it "fun" killing stuff, be it shooting stray pigs or fish in a barrel, then maybe that ain't so cool...