(This classic Dave Barry column was originally published Feb. 24, 2002.) My advice to aspiring humor columnists is: Never make fun of North Dakota. Because the North Dakotans will invite you, nicely but relentlessly, to visit, and eventually you'll have to accept. When you get there, they'll be incredibly nice to you, treating you with such warmth and hospitality that before long you feel almost like family. Then they will try to asphyxiate you with sewer gas. I found this out when I went to Grand Forks, N.D., in January. I had made fun of Grand Forks and its sister...