Irrational?
I've personally seen a house blown clean off it's foundation in a nearby neighborhood due to an undiscovered leak in a gas line entering a basement. All that was left was a hole in the ground and several houses nearby were so severely damaged they had to be evacuated. Something similar happened in New England a year or so ago due to poorly regulated line pressure. While not common, natural gas is nothing to fool with and it's hardly irrational to be wary.