That's true. They could go to the opposite extreme and treat Homo Erectus just like some new species of chimp. However, this is unlikely. Homo Erectus is a lot closer related to us than any living animal, and calling them animals would only blur the line too much for their gullible followers.
People would ask, what then constitutes a human? And Creationists would be hard pressed to find definitive differences of quality, not just scale, between us and the Homo Erectus. I think they'd just take the easy way out and call them microcephalic humans.
One of the Answers in Genesis articles I cited in my last post states:
But regardless of their stature, all people are descendants of Adam, created in the image of Godwhich also explains the hobbits’ apparent use of fire, stone tools, and hunting.
Explains their use of "hunting"? Are lions descended from Adam too?