Would you mount a cargo rack in front of the rig?

We use to see bike racks and even spare tires on the front of Class C types and others quite frequently. It will for sure block some airflow. A bike would probably not block too much but two or three.
A tire on the front might be a good ider with all the deer in some areas.....then again..maybe not :)
Class As are just about all a thin fiberglass or something suspended from top and sides. Wouldn't work too well without a big frame affair from underneath.