Bell at Arby's

I am not a big fan of Arby's the fast food restaurant. They do have some nice curly fries though. Anyway, I have been there for unstated reasons and whenever people leave there is a bell that says "ring the bell if you had great service!" So people ring the bell when they walk out. It is very annoying and I know see someone walking out thinking 'don't ring the bell don't ring the bell.' Of course, they do.