Retired GI Patents Roller Potty

While he was serving in the desert sands of Iraq, Sgt. Lou Tennant had a brainstorm. Auto manufacturers have provided conveniences like DVD players, refrigerators, televisions, and ceiling fans. However, Tennant  noticed that they had omitted one of the most necessary human functions - taking a shit.
Tennant's patent was approved on November 26th, and grants him sole rights to produce and install built-in crappers in automobiles, buses, trucks, and motorcycles. He hopes that soon, drivers will be able to "take a crap" while driving down the road or waiting in a fast-food line. Vehicles may be equipped with a single unit for the driver or multiple units to accommodate all passengers. "Sheeeeit we could put them in golf carts, air planes, hell we might could put one on a horse, but it might kill him." Tennant said. So far Tennants' company has received numerous orders from a local judge to vacate the premises.
His own car is a 1977 AMC Matador, and  is equipped with four of the devices in the front seat, and three in the back.
Are the devices safe? Not according to Perfessor Peter Sternworterson of the Audubon Society, who believes the device could trigger subtle changes in air quality and encourage peeping toms.