If you’re down on the National Mall this weekend and see, oh, 12,000 flags stuck in the ground, don’t be alarmed. The Federal Government hasn’t started an experimental flag farm, nor is the display an effort of the area’s squirrels to show their patriotism. The flags have been planted to represent the 12,000 members of the United States military who have been discharged under the practice of “Don’t Ask, Don’t Tell.” The policy, which governs…