As for the warning, lawyers must have thought it was a good idea in case the companies screw up again.
> Liebeck was in the passenger's seat of a 1989 Ford Probe, which did not have cup holders. Her grandson parked so that Liebeck could add cream and sugar to her coffee. She placed the coffee cup between her knees and pulled the far side of the lid toward her to remove it.[10] In the process, she spilled the entire cup of coffee on her lap.[11] Liebeck was wearing cotton sweatpants, which absorbed the coffee and held it against her skin, scalding her thighs, buttocks and groin
By that reasoning all of the coffee you make at home is defective. Arguing that something is corporate propaganda is rather underhanded when the facts of the case are publicly available for anyone to read
It was found that McDonald's, as a franchise, mandated coffee to be served at this temperature, generally 20 degrees higher than the temperature of take-away coffee served at other establishments.
This 20 degrees difference accounting for the difference between third degree burns within seconds and a significant chance at preventing the third degree burns.
Liebeck's behaviour was of course risky, but even applying common sense, she could not have expected the coffee to be _this_ hot.
McDonald's was also aware of the tendency of drivers to want to immediately drink the coffee after buying, yet continued to insist on serving at this extremely high temperature.
McDonald's should have been the ones to apply some common sense and simply lower the mandated temperature.
I don't know how hot the coffee you make at home is, but the whole process is probably less risky that being handed a cup while in a small space.