Huh, I thought it was changed so that it would kicked you back into the map after a moment.
It's been a VERY, VERY long time since I've been anywhere near the border of the map. Last time I was, it was trying to sink a CV before it became invincible after sailing through land at map edge. I forgot the name of the map that did this; Compello? Was in the far NE side of the map. This is where I remember it happening the most.
I would be happy with all ordnance and ammo taken away upon leaving the map.
Nope. A couple of options: It should hard forced a course change (you could lose your drones this way) or put you in the tower outright. The border should be highly visible as well, so someone intercepting can't complain about the sudden hard force course change of their target. And if the border huggers come back with, "I had to/wanted to go afk because of <blank>"; Aaaaannnnnnnd....?
In WoWs, you'll "skate" along the border if you hit it. After a few moments you lose, if I remember correctly, up to 75% Engine Power until you move away from it. So maybe a setup like this? Obviously not the 75% engine power, but force a drop to cruise settings and level out could be put in it's place until you are far enough away?