Canada

As someone with a farm in the middle of the worst infestation area in N. Alberta, hunting can control them, but it has to be very, very intense. We killed about 300 of them over 4 years and haven't seen a pig or pig sign in almost 3 years now, by hunting down sounders to the piglet, and doing it quickly before they could spread out.

But the same goes for trapping. We had the province "trapping" but they never really wiped out sounders entirely and it never improved the areas that were being trapped. When they brought a different group in that did it properly, they made a difference.

A bunch of weekend warriors out plinking for them does not accomplish anything.

Yep, creates smart and experienced sounders of boars. US states that are using testing efficacious methods are having great success with eradication efforts.

They have banned hunting and set up zones of populations. They target these zones independently. The efforts primarily focus on two methods of reduction:

camera operated spring traps that capture an entire sounder.

Helicopter sharp shooters who coordinate with drone pilots who have infrared cameras to spot sounders.

The key is taking out each and every boar in a sounder.

Source: Master Naturalist involved in eradication efforts.

It's a similar concept with coyotes. If you leave them alone the population stabilizes, if you hunt them they spread out and reproduce like mad and you end up with more coyotes. Unless you methodically take out every coyote in an area it's better to leave them alone then to hunt them if you want to keep the population down.

Boars are a different problem though, since they are so destructive. Definitely need a solution to clearing the area of wild ones.