Here's a novel way of alerting people to the privacy invading information trails we leave behind when using modern technology -

"Visitors to an art exhibit at the Pittsburgh Center for the Arts got more than their martinis when they ordered drinks at a bar inside the gallery's entrance. Instead of pretzels and peanuts, they were handed a receipt containing all the personal data found on their license. Some patrons also got receipts listing their phone number, income range, marital status, housing value and profession. For added effect, the receipt included a little map showing the location of their residence.

The magnetic strips and bar codes on the back of most state's driver's licenses contain more information than people think. The way the swipers use the information might surprise them as well: Some bars and restaurants scan driver's licenses to catch underage drinkers and fake IDs, but they're also using the information for marketing purposes.

Last year artists and producers Beatriz da Costa, Jamie Schulte and Brooke Singer built the Swipe exhibit in Pittsburgh to show what's on the cards we all carry. "