Actually it is not design problem as karjunkie states it is a design purpose.
What is a design purpose ?
Thats one of those things the manufacturer knows about, but doesn't do anything about the design on purpose.
If it didn't cause some kind of damage, then how would they get the customer back into the dealer for repairs ?
Every manufacturer has design purposes, some are just better at concealment than others.
Oh, And one other thing, How many people have several holes drilled into the bottom of their trucks that are filled with epoxy ?