Are you upset because you think that towing this load is a dangerous practice or is there another reason?
If forklift trucks were not designed to tow a load then I'm not sure whay they are supplied with a tow pin. Nevertheless I have never heard where simply towing a load is a dangerous practice.
Towing in the forklift truck is industry is measured in draw bar pull which takes into consideration such things as coefficient of friction, incline, decline and weight of load being towed.
The danger of towing a load comes in not in the towing process but more in the braking process.
Even though I am not a Toyota fan either product or corporate wise, I do not believe what is being done is dangerous. In reality,I would expect that a 5000# capacity forklift truck can tow a 60,000# load.