Why are squatted trucks banned?

Reduced visibility is the justification used by the governments of Virginia and North Carolina for prohibiting squatting trucks. 

It's challenging to see out of the windscreen and over the hood when the front is raised and the rear is lowered.

You are allowed to elevate the front of your vehicle in Virginia, but it cannot be lifted higher than the back by more than four inches.

In order to control squatting trucks, South Carolina is now enacting its own legislation.

This is ironic considering the alteration is sometimes referred to as   

the "Carolina Squat" by supporters of squatted vehicles.

The "Tennessee Tilt" and "Cali Lean" are among other names.