Re: Seller beware
The reason Apple don't generally check the phones is what makes their return policy so awesome. You go into a store, they check if it works by pressing a few buttons, if it doesn't - brand new phone.
All the Apple stores around where I live are always packed, with people waiting to be seen. I shudder to think what would happen if all those people now had to sit around waiting for a technician to open up their phone and check it (and only a few employees would have the training to do that).
If it was so easy to fix the problem, I'm sure the most valuable company in the world would have figured it out. In truth, it's not a big deal. It's better to have a great return policy with a few weeds than no lawn at all.