All I have to say on the subject is "War of the Worlds" 1930s radio version. People fell hook line and sinker. Some people, too damn many, will believe anything they hear on radio or TV, and in some cases, the movies.
"War of the Worlds" was a play, and was not claimed to be anything different. Note that it was aired during a time when fear of foreign invaision of the East coast was a concern, which can partially explain the panic of some.
This particular radio stunt was played out seriously until the very end by the on-air voices. I did not hear the actual broadcast, but did see the TV coverage Thursday night about the public reaction and pressure on the station. The radio station did not make any announcements in response to the inquiries from the news media.
Also remember, when you start that "people are dumb enough to believe anything these days" argument that the same observation can be applied to those "personalities" that are hired by radio stations. I was skeptical that a puppy drowning would actually take place, but then, ya never know how dumb these radio DJs really are nowadays.
They are still being dishonest by claiming it was "for the kids" when it really was for their own publicity.