
According to Wikipedia:
The Church of Stop Shopping is an activist performance group based in New York City, led by Reverend Billy, the stage name of Bill Talen. Using the form of a revival meeting, on sidewalks and in chain stores, Reverend Billy and his gospel choir exhort consumers to abandon the products of large corporations and mass media; the group also preaches a broader message of economic justice, environmental protection, and anti-militarism, protesting sweatshops and the Iraq War.
While that is a good description, to witness this in person is something else altogether. The Reverend and his choir have a habit of showing up at the local Starbucks unannounced for what I guess you could call an exorcism (Jesus release the demons from this cash register). The ensuing meelee often could most accurately be described as ‘bananas’ — as the situation devolves into rapturous preaching in the midst of thoroughly confused coffeeshop patronage, then further into confrontation with a batallion of thoroughly unamused police. In the end though, it feels less like you’ve been preached to than entertained in a way and what you take away is a memory not just of the spectacle but the content of the message.

A little background:
Bill Talen was a Dutch Calvinist Minnesota-born actor who moved to New York from San Francisco in the late 1990s, where he had originally created a character that was a hybrid of street preacher and televangelist called Reverend Billy. This character was performed in various San Francisco alternative theater venues, where Talen had earned a considerable reputation as both a performer and a producer (Life On The Water theater, the Solo Mio Festival, Writers Who Act, etc.). In New York, Talen began appearing as Reverend Billy on street corners in Times Square, near the recently opened Disney Store. Times Square had recently begun its transformation from a seedy but lively center of small-time and sometimes illicit commerce—and also of New York theatre—to a more gentrified and tourist-friendly venue for large companies like Disney and big-budget stage productions like The Lion King. Whereas other street preachers chose Times Square because of its reputation for sin, Reverend Billy’s sermons focused on the evils of consumerism and advertising—represented especially by Disney and Mickey Mouse—and on what Talen saw as the loss of neighborhood spirit and cultural authenticity in Rudolph Giuliani’s New York.
Talen’s chief collaborator in developing the Reverend Billy character was the Reverend Sidney Lanier. A cousin of Tennessee Williams with an interest in avant-garde theater, Lanier was then the vicar of St. Clement’s, an Episcopal church in Hell’s Kitchen that doubled as a theatrical space, where Talen was working as house manager. Lanier encouraged Talen, who was suspicious of religious figures after rejecting the conservative Protestantism of his youth, to study radical theologians and performers; of these, Talen credits Elaine Pagels and Lenny Bruce as particularly strong influences. Though Talen does not call himself a Christian, he says that Reverend Billy is not a parody of a preacher, but a real preacher; he describes his church’s spiritual message as “put the Odd back in God.”

While Reverend Billy commonly operates his ministry on the streets and in the chain stores of New York City, he travels and is known worldwide. Years of preaching the gospel of stop shopping has led him develop an entirely unique, effective and often hilarious method of teaching through ‘preaching’ about the dangers of rampant corporatism and consumerism…and how they connect with population exploitation, the environment, militarism and you. So if you’re out shopping and a strange looking preacher happens into your store to exorcise the demons from the cash register, don’t leave, check it out! He’s got a point.
Visit Reverend Billy’s official website