A Truck Hauling a Porta-Potty Was Pulled Over for “Ejecting” Toilet PaperA Truck Hauling a Porta-Potty Was Pulled Over for "Ejecting" Toilet PaperA locked porta potty. A truck hauling a porta-potty on a flatbed trailer was pulled over by police in Arizona last month. Cops say it was “ejecting” toilet paper onto the interstate. On the plus side, it sounds like it may have been CLEAN toilet paper. One official said, “All cargo (even a porta-potty) must be properly fastened to prevent debris from entering the roadway.