Raise your hand if you saw this coming.
Contracted employees, leaving an Amazon warehouse, have to go through security screenings. They sued for overtime pay under the Fair Labor Standards Act. The district court dismissed their lawsuit, but the Ninth Circuit reversed, holding (contrary to every other circuit court that has considered the issue) that post-shift activities that would ordinarily be classified as noncompensable postliminary activities are compensable as integral and indispensable to an employee's principal activities if the post-shift activities are necessary to the principal work and performed for the employer's benefit.
Not only was this a Ninth Circuit opinion (REVERSE) and contrary to the other circuits' holdings (REVERSE), but the issue is clearly controlled by the Portal-to-Portal Act, which was passed in response to a 1944 Supreme Court holding that was about as broad as the Ninth Circuit's and nearly bankrupted a number of American industries.