Chris Baraniuk looks at the futility of things like traffic signal buttons in Press me! The buttons that lie to you:

Some would call this a “placebo button”—a button which, objectively speaking, provides no control over a system, but which to the user at least is psychologically fulfilling to push. It turns out that there are plentiful examples of buttons which do nothing and indeed other technologies which are purposefully designed to deceive us. But here’s the really surprising thing. Many increasingly argue that we actually benefit from the illusion that we are in control of something—even when, from the observer’s point of view, we’re not.