I have an ex boyfriend who is more then obsessed with me and since we broke up has been stalking me. I am scheduled to go on a cruise in June with my family which he knows about since it was booked when we were still together. I am worried that he is going to book the same cruise to harass me. I have a restraining order barring him from coming with in 500 feet of me, can I use this to insure he can not board the ship?