And your point is?
My macbook is well looked after. It rarely is transported and is mainly used at the kitchen nook or on the lap in front of the TV. However, my 16 month old white Macbook just this last weekend cracked at the palm rest. Today, I booked an appointment with an Apple Genius to get it repaired - even though it is out of warranty - because as I looked into it, this appears to be an epidemic problem for Macbooks. The web is littered with tails of cracked Macbooks all in the same spots.
Are you suggesting that everyone is careless with their products? I have a HP laptop for work, and that thing is abused, but it is tough as nails - 3 years old and going strong... The Macbook in comparison seems to be as tough as a butterfly.
EDIT: Went to the Apple Store today, and they are repairing my out of warranty white Macbook for free. While it is good that Apple has the out of warranty coverage, they really should step up and publicly come clean that the plastic is cr*p and that they will repair your Macbook for free it it cracks and has no sign of abuse. I believe that a lot of people are not aware of this and so live day to day with a cracked case so as not to incur out of warranty repair costs.