Clark is a frequent traveler, and it's not too long ago that he recalls people queuing up in airports at endless banks of payphones. The mad rush for payphones in the pre-cell phone days gave rise to a dangerous crime called shoulder surfing. Criminals would pretend to videotape family members near the gates, but they'd really be filming people punching in their long-distance calling card numbers. The crooks would turn around and sell those codes all around the country within minutes of filming.

The days of shoulder surfing are now long gone; payphones may be the next to go. AT&T has announced that it's getting out of the payphone business. There are some 300 million people in our country and more than 250 million of them have cell phones. The 50 million that don't is largely made up of children, such as Clark's 2-year-old son and his 8-year-old daughter. But while we no longer have to worry about shoulder surfing, we can still fall victim if our cell phones are stolen. Clark gets tons of calls from people who get stuck with a huge bill when criminals make international calls on their phones. So it may be wise to get your international long distance blocked. At the very least, be sure to report your phone stolen as soon as possible. That way you'll be able to avoid this costly mess. On a related note, Continental Airlines in Houston now allows you to check in with your cell phone just by showing your e-boarding pass.