Ooooooookay...there was the Piltdown Hoax, and then there was...your turn! Name another...
Ping.
Ah but you miss the point.
The point is not that there have been hoaxers......
The point is that the vast preponderance of people in this field are easily taken in, whether by very crude hoaxes or by sloppy "science."
The follow-on to Piltdown is Hesperopithecus, in which a dim-witted goofball named Osborne, who ran the presigious Museum of Natural History in New York, lifted a pig's tooth to the light and testified in rapturous tones that it was obviously a hominid fossil. From this hogstooth was construed a whole industry of hogwash, including "scholarly" papers, touring lectures and reconstructions. This from the "best and brightest" paleontologists in the world.
And there is more.... I would continue with, uh, so much to choose from, how about with Ramapithecus?
.....But I have to get to work, with all my fellow yahoos, so I'll let y'all figure that one out.