The plans were scrapped, obviously, though they were de-classified after some time. I'd like to go find the specific details but can't recall enough off the top of my head to have much to search with.
Honestly, it doesn't matter so much, as it's not something that I think was horribly taken seriously, moreso one of those "brainstorming" session type ideas, where yeu throw everything on the table no matter how stupid it is, but it was recorded officially.
Then again, some other stupid things around that time included wanting to assassinate castro with an exploding conch shell.
But yeah, strange things have happened in the past, and even something dumb like that can be eventually used against yeu in the world of politics.