I agree that drilling for oil (particularly fracking) and water can often lead to subsidence which can have catastrophic effects. Yet, oil is a very dangerous substance, biochemically. One drop of oil (0.01 ml approximately) can poison 1m³ of water to render it undrinkable. Or in other figures: at a dilution of 1:100,000,000 mineral oil is still poisonous to humans and other animals.
When drilling for oil, you can't always avoid a spill and the consequences can be terrible.
Still, could you please explein the importance of New Orleans in the last World war you mentioned? I was not aware of any importance of that city. (No offense meant to any inhabitants of New Orleans!)