As a society, do we expect McDonalds to make that decision for us and just not sell coffee in the drive-thru?
Much of these cases is based on reasonable expectation. Would you ever expect your coffee to be so hot that it could melt your skin? No.
It think it is illuminating that so many people believe that Mcdonalds no longer serves their coffee that hot, but in reality, the only changes they have made in response to that lawsuit are changing their packaging, including adding warning labels. If you go to Mcdonalds and buy some coffee today, it could be just as hot as the coffee that that woman bought.
So to address this question:
> "Would you ever expect your coffee to be so hot that it could melt your skin? No."
You really should, because it still is!