Oh, krellin. (first, a lol.) You can argue that the aftermath of Katrina was so terrible due to negligent upkeep to man-made structures, but you cannot argue that Katrina was unnatural as a disaster. Using wikipedia as a definition, a natural disaster is "the effect of a natural hazard (e.g. flood, tornado, hurricane, volcanic eruption, earthquake, or landslide) that affects the environment, and leads to financial, environmental and/or human losses." By this definition, Katrina is far and away, no doubt, a natural disaster. BP's oil rig, on the other hand, is by no means a natural disaster. This is so easy to understand, krellin. If you were to ask a first grader to place a hurricane and a faulty oil rig into the categories of "natural" and "unnatural" disasters after supplying them the definition of a natural disaster, the first grader would succeed in labeling the two correctly.
Further, krellin, letting a roast sit in the oven for twelve hours and letting a roast sit in a metal barrel whose inside is doused in gasoline then ignited has the same effect on the roast (burned to a crisp), but it's absurd to speak of my negligence (sitting for twelve hours in the oven) and my inferno as being equal in any way. If you want to talk about "pragmatic politics - using natural disasters to push political agendas, for example" - then please, let's talk about a natural disaster being used to push political agendas. So far, the oil spill is the only candidate submitted, and it was disqualified by reasons earlier stated.
Your complete inability to be able to read and apply a simple definition is why I read your threads, krellin. This is why I lol so much.