There is so much science doesn't know, labeling it as decorating their homes is far fetched. There are 1000's of other reasons they could be doing this behavior that isn't anthropomorphism.
One possible explanation mentioned in the article is that "they're using the dead bodies of their prey to mask themselves in the scent of their local prey species". Seems a lot more likely than a tactic to strike fear into the hearts of their enemies...
It seems reasonable on the surface, but how long can these decaying heads maintain their scent? Unless they're constantly refreshing them with new ones, the scent would fade very quickly.
Now that you mention it, you're right: the title is anthropomorphizing in a baity way. That means it should be changed (from https://news.ycombinator.com/newsguidelines.html: "*Please use the original title, unless it is misleading or linkbait").
I've changed it to use what appears to be representative language from the article body. If anyone can suggest a better title (i.e. more accurate and neutral, preferably using representative language from the article), we can change it again.