The article keeps mentioning "unintended consequences" but I'm not convinced these are. Trying to come across as scary (perhaps because you are yourself scared) seems to be the whole point. "Get out of my way, look at how little I care about your safety, look at the size of this thing." The article mentions machismo but I don't think that quite covers the (profitable) pathology here.
Yep. Automotive grille design became sharply more aggressive over the last 20 years (not just in terms of hood height). It says a lot about the psychology of consumers.