I was watching the movie interstellar. Stop reading right here if you haven't watched the movie. This post contains spoilers.
In the movie the earth is dying. They send people into space different worlds to find out which world would the best suited for earth. They send the initial people. (I think its around 5 separate people) to different worlds. They have to brave. If that world doesn't contain the life saving materials they need. That person is stuck on that world till they grow old and move on.
It's a scary concept that you can be sent to a world without knowing if it could support human life. If it doesn't. Then you pretty much are stuck there in an alien world forever. If it does contain lift saving material. The person would put off a beacon that signaled to the other machines. It was interesting. This one person stuck on a world. They knew it wasn't life saving.
They sent the signal regardless. When they arrived then found him. He said " I hope you never know how good it feels to see another face. As he started crying holding to the other guy.
My point is. Everyone seems normal at first. Like the movies. They want go to another planet. Given a few years on another planet with only a few human beings. I honestly think some people would crack there is a transform to who they used to be. To what they changed into. As people pointed out. Some might go on a killing rampage after a while. I'm honestly curious about that part of it. Would some people crack if sent to another planet. If so. How long would it take. What would they do once they did.
It still seems a little noble goal to go on a one way ticket to another planet knowing that you are never going to see your world again. You are excited at first. How long in space would it take to change your mind. If it did at all.