Recreating Titanic Reality
While some cruises specifically focus on helping you to recreate something like this, in most cases, this moment is not going to turn out you would hope it would. The background noise and groups of other passengers behind you will more than likely ruin whatever romantic mood you were in. It might also make getting good pictures harder to do as well.
Having a group of drunk frat guys photobombing every attempt at a romantic picture might become a little frustrating after a while. Romantic moments of any kind might be a little difficult to create and capture on film.