I've realized that many drivers have the mentality that unloading anyone's trucks but theirs is a disrespect to them. When my sup is short on guys, he would ask some of the drivers if they would like to unload, the drivers would usually tell him that they won't unload anyone's trucks but theirs. Some would also joke with other drivers saying "I have seniority over you, go unload my truck". So is this mentality a culture nationwide at UPS?