I think they may overpopulate and cause problems.
They have litters of piglets not twins like a doe.
Hate to think of what it would be like if they got established on a chunk of posted land.
They may have an impact on deer in years of low mast. Imagine a herd of pigs under an oak tree gobbling up all the acorns.
It would be cool to have something else to hunt but I think letting them populate would be a mistake.
Of coarse if there were liberal bag limits and no closed season, maybe it wouldn't get too far out of hand. Of coarse probably better off not having any.