Re: Domestic cross breeding is the real problem
I spent the early '80s in the army, stationed in SE Georgia (the state, not the country).
Feral pigs were quite a problem, enough that we would sometimes stop patrolling and circle up when the pigs were checking us out at night. Got bad enough that some of us would carry a magazine of live rounds (as opposed to blanks, and carefully segregated from them), or personal sidearms. It was a well-known secret, and officers/NCOs never made an issue of it. The pigs did not seem particularly impressed when we shot blanks, but artillery simulators made them scatter!
I suspect things might be different these days.