Piltdown man was most definitely not an evolutionist fraud. It was a phoney fossil that was seen almost immediately to be something that didn't beling in the human family tree. It's as if you were putting together your own genealogy, and someone slipped in some documents purporting to show that your great-great grandfather was a guy who lived and died on Borneo, and who never left that island. If nobody else in your family had ever been there, he would be a most unlikely ancestor. It would be a very strange and suspicious data point in your family tree.
Eventually, through solid research, you would discover your real ancestor; although you might never learn who had handed you the bogus information. This would not be evidence that you were claiming a false genealogy. Rather, you'd be a victim of someone who was trying to discredit you.
That's why I suspect that Piltdown man was a creationist fraud. The fossil never served any evolutionist purpose.
And of course it's pretty obvious that it was created ;)