Who needs to carry that much that stuff to work!?

First of all, unless you are leaving the country you do not need to carry a backpack that can hold all of your earthly possessions. But let's just say you do need to carry a good deal of stuff with you on a particular day. If the train is crowded TAKE THE BACKPACK OFF OF YOUR BACK AND put it down to the side. Pleeeaasseee don't take up 3 spots on the already crowded train with your enormous backpack.