'Turn Off All Electronic Devices:' And What Happens if You Don't

It happens on just about every flight now, say flight attendants. The plane's door closes and it's time to turn off personal electronic devices. And there's always at least one person who keeps talking, texting, tweeting, playing, watching or emailing—and ignoring stern orders to power down.

On rare occasions, a confrontation erupts, such as actor Alec Baldwin's widely reported removal from an American Airlines plane in December. Although airlines say they don't keep track or won't disclose how many passengers get bounced off planes for refusing to switch off devices, flight attendants say it's now the No. 1 spark for unruly behavior.