Missing Passengers from Cruise Ships

After seening this news article on AOL
http://news.aol.com/article/cruise-passenger-missing-from-sapphire/684631?icid=main|main|dl1|link3|http%3A%2F%2Fnews.aol.com%2Farticle%2Fcruise-passenger-missing-from-sapphire%2F684631

I remember seeing a report not to long ago, couple of months as a matter of fact, that some other passenger on some other Cruise Ship line disappears or goes missing.

With the bouts of food poisoning
on Cruise Ships that were in the news, now it's missing passengers. Seems as if missing passengers on cruise ships is becoming an epidemic.