I saw more deer when I lived in the DC suburbs and far less people had grille guards. If any. I actually can't remember a single example. In both Austin and the DC suburbs pedestrians far outnumber large wild animals, so I think grille guards are frivolous and dangerous in those places.

I've lived here long enough to observe that grille guards are far more prevalent here than they are in other places, even other places where grille guards seem appropriate.