Liebeck v. McDonald'sPerhaps the most famous "frivolous" lawsuit, Liebeck v. McDonald's is a case in which 80-year-old Stella Liebeck spilled a McDonald's coffee in her lap, causing third-degree burns on her legs, lap, and groin area. After she filed the lawsuit, many people criticized her without hearing the full story. After all, coffee is supposedto be hot. In reality, McDonalds has had over 700 complaints filed concerning the scalding temperatures of its coffee.