David I for one respectfully suggest that you took that post totally out of context. I didn't read one letter advocating taking on a herd of elephants. It was just an analogy. Yes it can be done and back to the title a dirtbag would do it. It's another thing on the list that defines a dirtbag.
I know it's an analogy, but in the analogy the wielder of heavy weaponry is protrayed as the superior being, and the elephants are nothing more than an abstraction rather than the intelligent, emotional beings that they are. As you say, only a dirtbag would gun down a herd of elephants. The problem with military imagery is that it blurs the distinction between dirtbags and heroes by putting the focus on the weaponry. Along the same lines, anyone who would machine gun a herd of elephants would likely slaughter humans with the same feeling of superiority.
Perhaps I'm reacting to an attitude that I have seen (only occasionally) on the forum, that the group with the best weaponry or the most fighting prowess is necessarily on the side of the angels. Ironically, this goes hand in hand with the concern that the "dirtbags" out there are heavily armed. Regardless of how one views reality, there is a point of diminishing returns, as when one imagines a crowded movie theater with good guys and bad guys blasting away at each other with machine guns.
Evidently this does relate to the dirtbag theme of the thread, but again I apologize if I have expanded the topic beyond recognition.