The planeteers were renowned to be very protective of their jet. To the extent that when they were approached by leading[aerospace companies about being able to research the design for mass production they declared all aerospace research to be abandoning the earth to ecocide and that the human race must limit themselves to half a billion or face earth's wrath. Because they only traveled during the day (and thus had to do all planet saving by night) some have speculated that the Planeteers are, in fact, vampires.