Cam Phones, Go Home

The ability to snap pictures on the go is being curtailed

Those camera-equipped cell phones may be the latest must-have tech product, with more than 31 million sold in North America last year alone. But the ability of users to snap pictures on the sly almost anywhere they go--and even put the images on the Internet--has prompted a growing number of places to institute a ban on the devices.

General Motors, Dell and Samsung--one of the leading producers of the phones--are among the companies that have prohibited employees from taking cam phones into sensitive research and production facilities, to prevent corporate espionage. Schools are banning them to halt cheating, since students have...