In a segment in Takeshi Kitano's Glory to the Filmmaker, it cuts to two friends in the Cho-Ten Ramen Shop that think their food tastes bad so they plan to complain and put a fake roach in it. But then the table next to them (Gedo, Cursed Blonde Toru Yano, Jedo and I think Goto) complain there's a roach in their food too.
So, the chef/owners of Cho-Ten come out to have a discussion...
https://www.youtube.com/watch?v=GYsg3DWmCZs