Being burned by people wanting to "help" by hunting hogs is one reason a lot say "no". Been there, done that. Not sure how anyone can mistake a 600 lb. angus steer for a wild boar, but it happened.
Also, hunting is just not effective. Shooting 1, 2, or even 3 pigs at a time as time allows doesn't dent the population. Especially if all the neighbors aren't doing the same. It takes solid, consistent pressure from multiple sources to keep the pigs away. Trapping as many as possible, then specifically targeting and shooting those pigs that are trap-wise. Even then, something like poison would still likely be necessary to take the numbers required to decrease the population, and getting poisons approved has been a difficult, slow process.