If this were true, then we wouldn't be having this discussion. The most common mistake during endgames is people hauling something that has not been called.
Some of the people who do this do not know any better. Hopefully they can be educated.
Some of the people who do this do know better, but they don't care if their extra few PP ruins the experience for 24 other players. These players are selfish.
Some of the people who do this do know better, but they take pleasure in ruining things for other players. These players are sociopaths.
not hauling what is called is for 99% not a mistake but done with a purpose. Some are not familiar with the endgame and do that by mistake. But if you talk and explain the last group of people why it's a mistake they change and start follow the calls.
Supplying during the endgame is raising waittimes even more and faster, the best is to haul from empty industries.