I'd like to say it is because they are smart enough to know which setting would give them the best option of finishing it on their own terms. However, it is most likely because they are going to the places they know the best, or where they felt bullied or left out.
This whole thing had me practicing my concealed draw again. Long ago I learned that to maintain mediocrity I need to do it three times a week, to improve I need five times a week, and to be the best it is everyday. I don't need to be the absolute best, but I do need to practice more than once or twice a week just to remember how to be comfortable and not obvious about rubbing the gun through my coat.
I love my 1911 in a bianchi leather, but all my jackets are too short. I works great under my suit and sport coats, but the pretty stainless muzzle hangs an inch below my favorite NRA leather. When watching Personal Defense TV, I notice that Tom and Masad love to wear their vests. Does anyone really run around town in those tactical vests?
Back on topic ... Minnesota is a "shall issue" State. Along with that schools, law enforcement, governmental building, etc. are no carry places period. However, as a part of the law that allows people to post their business or property as no guns, it is not illegal to carry there. If they find you are carrying they can ask you to leave, and then you must. But, if they don't ask you to leave your ok. Since the main part of this part of the law is "concealed" it should be no problem unless you find yourself in a situation like Omaha. Minnesota's castle docterine also says that you no longer need to flee your property or where you are. You are free to defend yourself (you still can't run through the mall trying to hunt the guy down). I smile every time I walk through the doors of the Mall of America, right past the NO GUNS!!! sign with a locked and loaded 1911 and two extra ten round mags (probably would never need them in a fight, but hey, their small and fit easy in the pocket).
MALL SHOPPING HINT: If you want really good service in a men's store (sorry guys - I'm talking clothing not guns and ammo this time ... and unfortunately no brass poles either) carry your gun when shopping for a suit. When the salesman gets ready to help you out of your coat and into one of theirs, turn and whisper (remember that concealed means secret) that you are carrying. After the initial gasp you tell them you always do, and you needed to in their store to be sure the suit fit. You will end up with either the owner or the top manager working with you, usually one of the "senior" tailors, and in a nice private fitting area instead of the middle of the sales floor. I have never needed to go back for a refitting on a suit that was tailored when I was fitted with a carry gun. The down side of this is that I no longer buy my suits in our local small towns. I don't want every shop owner in town knowing that I carry. Remember, if something goes bad when you are in a place you don't want someone blurting out that you need to draw or something dumb like that, and in our towns of 1500 down here it could happen.