My advice is eliminate the invaders QUIETLY. Don’t brag, don’t publish, keep it quiet and secret like a Mob Hit. Remember. These Criminal Invaders don’t legally exist as citizens. Capture, execute, burn the corpse in a metal barrel out in the middle of nowhere. If every town does this to a Criminal Invader per every day, there will be no more Criminal Invaders to threaten your children, none will be able to rape your wives or daughters, and none will exist to threaten your life.