Comment by hn_throwaway_99

> 180-190 degrees Fahrenheit, vs 140 or so for coffee brewed at home

Did you just make up that 140 number? To add to the other sibling comment, SCA (https://sca.coffee/) requires that water contacts the grounds at a temp of 195-205 F and that the coffee be at a temp of 175-185 up to 30 mins after brewing in order to certify home brewers:

> The SCA ensures that the brewer's carafe is appropriately sized for its designated machine and can maintain the coffee's warmth. Specifically, the brew must stay within the range of 176 °-185°F (80°-85°C) for at least 30 minutes post-brew. While retaining this warmth, the machine must never actively reheat the brew, ensuring the coffee's nuanced flavors remain intact. (from https://us.moccamaster.com/blogs/blog/certified-by-the-sca-m...)

Then you say

> Other customers had suffered similar burns, and McDonald's knew about it and did not change the policy

Again, lots of people cut their fingers off, accidentally, with knives. I don't think this means knife makers were "willfully and inevitably causing injury to random customers" because their product was too sharp.