At some point in time (and I cannot pinpoint the guilty party) all of the fossils lumped under the name of Australopithecus afarensis started being reported in creationist literature as a single find (as if evolutionists discovered what they believed to be a single fossil called Lucy). By claiming that evolutionists claimed there was only one individual it became easy to discredit.
this is a common creationist strategy. it is sowing two untruths at once, in fact:
1. that paleontologists only have a handful of fossils, and very few hominids.
2. that they are easily fooled, or just make things up, because they sit around all day daydreaming.
it's almost insulting to hear people who have absolutely no understanind of science, anatomy, biology, physiology, or geology just assume that nobody else does either.