Since obviously people can't trust these businesses to provide a quality product in a safe manner, it would be better if people kept expecting them to.
The staff didn't spill the coffee on the lady, she did it to herself.
I doubt this would go to court in other developed countries where healthcare is free!?
And according to other coffee-drinkers here, DD serves their coffee much hotter than other places, so no, it's NOT reasonable to assume it'll be that hot.