I said sometimes, like when I pick up at one of the refrigerated warehouses that is teamsters represent here in the area. A couple drivers who found out they were overloaded complained after hitting the scales and that went to the union rep with hope he would side with the drivers. I said hope because it has been a problem before. The rep told the drivers "take the ****ing load or you won't be driving here".
I've seen the reverse happen, the drivers know they were overloaded or something else is wrong and complained with the union backing them and the company fixed the problem.
I understand this may not be the norm, I give you that but it seems that by blaming the company and not taking responsibility for your load is what the union - UAW/Teamsters - seem to created in the mentality that many have.