Everyone ignores the fact that the Sweden/Norway border divides two nationalities and each control all their territory. The UK simply doesn't physically control much of the the border, particularly but not limited to south Armagh, and couldn't, even with tens of thousands of troops, in the recent past. The Queen's writ doesn't run there: it's not similar to Norway or Sweden. It's unlikely the British army will be back playing Cowboys and Indians with the rural IRA (who are nothing like the Che Guevara t-shirt wearing urban variety) but much academic discussion is rendered moot by the facts on the ground.

Does Sweden have a Bandit Country like NI? If there's a hard Brexit that place will be crazy, like cheaper cocaine for the UK crazy.