Recently my faction has a problem with a griefer infiltrating us.. while this is my fault it brought up the idea of a way to lock YOUR ship to prevent even other faction members from doing anything to it without your permission. That could be ranged from placing removing blocks or even getting into the core, or maybe something not so extreme... a way to prevent other players from saving blueprints without the creators permission after they get into your ship. I understand they can't buy your ships if you set the permissions to prevent this.