I don't think it will attract people that don't want to grief you. Since this game is completely money based, and skill based. Meaning that I didn't see anything that says, you level up. So the only thing you lose by dying and going a normal player is your iron man wealth.
What I can see people doing, who love to grief, which they do basically the same thing in other games, like uncharted waters online. They will make another account. I am quite sure I read in the FAQ you are allowed to have more than one account. So they will use one to just store up iron man wealth, and instantly respawn back as a new iron man captain with a top tier ship. Totally by passing any danger of being iron man.
The only way I would do ironman, which I like the idea, is if players can't trade with each other. Or they figure out another way to stop that. In uncharted waters online, the downfall to being a pirate is that if you die to a player they get most of your bank. All pirates keep a second character logged on that holds their wealth.
And as the other guy said if you get a group of gerfiers then they don't even need 2 accounts.
Unlike uncharted waters online , which only has the earth as it's map, which is pretty huge. This has the whole universe, so I don't think dying to players will be a problem. We may find if they spawn us in at the same spot every time, a fleet of griefs just camping that spot, but I am pretty sure they said they don't allow that kind of behavior. Even in unchatered waters online where it's small compared to this, you rarely encounter a player pirate.