Won't happen if you are careful. I know plenty of keepers who use that kind of substrate without any issues. Plus, baby Antaresia love burrowing, and it gives them a chance to exhibit their natural behaviours. In fact, the ability to burrow in their enclosure is more important than the ability to climb, in my opinion, since they are no where near arboreal. You could also always feed in a separate container, if need be. I know that might be harder for people with more animals, but the OP is considering only one snake.