This thing has been going around a long time. McDonald's is bad and people will believe anything anyone makes up about the case. People on the internet tend to be contrarian, so they jump on the chance to say "well actually the women that sued McDonald's was in the right, I know this because I'm much smarter than anyone that thinks otherwise!"
The flaw with this meme is making coffee involves boiling water. You can't actually heat water above 100C without it turning to steam. The coffee served to the woman was significantly less than the boiling point of water, because McDonald's isn't able to change physics. The injuries the woman were horrific, but anyone would suffer even worse injuries if the spilled water on themselves while making a pot of Mac & Cheese. Like anything that involves boiling water to make there's an expectation that you need to be careful when handling it.
The reality of the story is the lady that got burned admitted it was her fault. The reason she sued was to pay her medical bills. The real issue is lack of healthcare. Handling boiling water is a common thing, an accident can happen to anyone. Having a system that depends on either having a corporation associated with the accident you can sue or face bankruptcy whenever you have an accident is the real stupidity here.
I mean who would you sue if you tripped while carrying a pot of Mac & Cheese and got burned because of it? The Kraft Corporation maybe? Dumb system that brainwashed people into trying to blame accidents on a nearby corporation instead of fixing the real problem.