Reply all had a great podcast on the wild boar problem in the US south, jumping off the “30-50 wild hogs” tweet
The sharpest shooters can get a few as they scatter, they are damn smart and very capable.
Unless you can guarantee you'll kill all the hogs that scatter due to the helicopter--not just the ones you see!--then it's likely counterproductive.
Plus there are far easier solutions. Poisoned corn does about the same thing as mines, but with less risk (assuming you put up signs) and cost. Both are probably still bad ideas, though, because of the effect on other wildlife.
I don't like poisoned bait for broadly similar reasons; I'd like more targeted slaughter. It's not easy to get a big gang that close together.