1) The data is fabricated and some of the researchers were in on it.
2) The data is fabricated, and the researchers are extremely sloppy, irresponsible and should be ashamed of their poor work ethic.
How can you not have done any kind of analysis on this data, even if only for curiosity's sake? No plots of the distributions? Nothing? Come on, it's stuff that take 3 mins to whip up in python.
In this age of misinformation, we don't tolerate people spouting lies even if they claim to think it is the truth. I don't see how this is any different. They didn't even attempt to do basic verification.