I don't think theres ever been a true report but I honestly would be surprised if something like that has never happened befre, especially with a small person or child. But obviously its not a common ocurrence, especially with no truely monster pythons existing anymore in the wild.
Hopefully this "test" proves how stupid that map was. It may not be humane for kind for those snakes but its fr the good of the species in the hobby and for there reputation.