In 2005, the US Postal Service (USPS) began to get into the crowdsourcing business. For a fee, anyone could create custom stamps that could be sold through the government’s approved stamp portal (Stamps.com), provided they survived a cursory review by inattentive public servants.
The USPS, having recognized the wisdom of the crowds, decided to divest itself of this perhaps unwise investment a few years later. But not before committing some First Amendment violations, as the DC Circuit Court of Appeals notes in this decision [PDF] that appears to be a decade-and-a-half in the making.
Anatol Zukerman is the plaintiff. In response to the custom stamp program, Zuckerman created a stamp that expressed his displeasure with a recent Supreme Court decision.