The likely logic for  landowners only or specially permitted "others" would be to keep from encouraging hunters from letting these things lose.

If it were legal to kill them on sight by anyone there would be more people who would sneak around, break the law, and release them for sport. This is how they got started in most places they exist.

Should make for an interesting season. Do you have a feel for the population? Seeing a lot of damage?

the game & fish better get on the stick quick, them hogs shore do like turkey eggs.

Three S's - or in this case S, CUAP, S, and S

"shoot, cut up and package, shovel, and shut up"

If there's no season and nothing in regulations then there's not a jury in the land ......

In some states, unless the animal, is specifically mentioned in the laws, they aren't protected.  In Delaware, red foxes were totally protected for many years (some season on them now)-you couldn't even have a tail or piece of fur for fly tying-because the foxhunters had friends in the General Assembly.  Gray foxes aren't mentioned and there is no protection whatsoever.