Here is what we do - we need to become really picky customers.
Right now, my iPhone screen is dimmer on the bottom than the top. I now consider this a defect, and will now return my iPhone, and keep returning it, until I get a defect free iPhone.
Before I was willing to tolerate things like this - but no longer.
Every product I get from Apple must be perfect, and its its not, I will use my warranty privileges to the fullest. I will get my money back, one way...