
The Piltdown Hoax, contrary to creationist claims, is not an embarrassment for science but a vindication of the scientific method. It shows us how even if human weakness and vanity intrude into science, or even if the evidence is viewed through the distorting lens of cultural assumptions, the scientific method eventually weeds them out.
The process of reexamination - of allowing doubt and uncertainty to drive reassessment - and above all to be prepared to admit it when previous beliefs and accepted wisdom begin to look out of kilter with more recent discoveries, it what makes this weeding-out process an integral par of the scientific method. And of course the original perpetrators of hoaxes and falsification of data eventually die, so future generations have no vested interest in maintaining the deception and everything to gain from exposing it.