The NRA's Enemies List calls to mind the taxonomy

 of animals that appears in The Celestial Emporium 

of Benevolent Knowledge:

1.  Those that belong to the emperor

2.  Embalmed ones

3.  Those that are trained

4.  Suckling pigs

5.  Mermaids (or Sirens)

6.  Fabulous ones

7.  Stray dogs

8.  Those that are included in this classification

9.  Those that tremble as if they were mad

10. Innumerable ones

11. Those drawn with a very fine camel hair brush

12. Et cetera

13. Those that have just broken the flower vase

14. Those that, at a distance, resemble flies.