I remember reading that NASA's psychological selection/screening process is top secret or something like that, but if you read between the lines and analyze the astronauts themselves, you quickly conclude that yes, if there is fuel and a giant unexplored opportunity nearby, don't get in their way. Not only are they adventurous, but they will push just about any boundary; that is their default setting.

Sometimes there are "interesting" incidents where you get to see this psychology in weaponized form, like the Terminator-esque jilted astronaut lover story from back in 2007. I'm not surprised at all to hear that contingency means might be taken to limit related risks on space missions.