This is just another example of how zero-tolerance policies are not always helpful.
Last Sunday, Henry Echevarria and his wife Lisa were boarding a Carnival Cruise and were going through security check. An officer was searching his stuff and pulled out Echevarria's gun-shaped house key and told him that he could not board the boat with it in his possession, claiming that it was a "prohibited item." It's important to note once again that this is simply a house key shaped like a gun and in no way an actual, functional gun.
Carnival said that their policy states that "all firearms including replicas, imitations and their components" are prohibited on their ships. So they made Echevarria hand over his keys, which they kept in a safe for the duration of their cruise. If he didn't hand over the keys, he and his wife could not board the ship.
After the fact, Carnival admits that this all should have never happened, as his house key is not considered a replica or imitation. Yeah, no s**t.