The rule, however, is enforced only on the honor system--which in California means spottily.

FORBES: Magazine Article

From August 8-18th, in this ingenious 30-city social experiment, Honest Tea was using the honor system to see which city had the most honest people.

FORBES: Connect

Just make sure you're facing off against a trustworthy opponent, as NERF is relying on the honor system and it's pretty simple to just flick the lever in the basket to rack up points.

ENGADGET: NERF Cyberhoop hands-on: foam basketball for the iPad generation

Initiated on a (creative) whim by a couple of ingenious Honest Tea field marketers, the company placed unmanned kiosks in various public locations around the country and asked people to deposit a dollar for each beverage, using the honor system.

FORBES: What Does Creativity Look Like in Branding These Days? Three Marketing Pros Weigh In.

But even people who clicked on the button were still being tracked because advertisers and tracking companies hadn't agreed to honor the system.

WSJ: Web Companies Agree to Support 'Do Not Track' System

"This is very much an honor system, " said Paul Boyce, a public affairs specialist with the Army.

NPR: U.S. Army May Restrict Soldiers' Blogs

It has been my honor to serve the population in Peru with the support of CMMB, Bon Secours Health System, and CHRISTUS Health.

WHITEHOUSE: United Against Infant Mortality

As Americans, we honor the strivers and the dreamers and the risk-takers, the businesspeople, the free enterprise system -- the greatest engine of growth and prosperity the world has ever known.

WHITEHOUSE: The White House