Well this might explain why.
Communications with the simulated mission control and loved-ones will take up to 40 minutes, the time that a radio signal takes to cross the void between Earth and a spaceship on Mars.
That means 80 minutes between post. I would get pretty frustrated. I get really annoyed sometimes when it takes a minute to refresh a screen with a lot of graphics during peak internet traffic.
Being IBTZ would be out of the question.