If this is actually a problem, it's easy to fix: have a required 6-month stay in a Mars simulation on Earth, complete with inedible food and unending labor. I

If this is actually a problem, it's easy to fix: have a required 6-month stay in a Mars simulation on Earth, complete with inedible food and unending labor. I doubt that it would be, though. If someone not only claims that they want to toil and die on Mars, but actually gets a ticket to leave all their friends and family behind on Earth to do so... that's not the sort of thing that people do lightly.