"Travelers should avoid using public USB powercharging stations in airports, hotels and other locations because they may contain dangerous malware. In the USB Charger Scam, often called “juice jacking,” criminals load malware onto charging stations or cables they leave plugged in at the stations so they may infect the phones and other electronic devices of unsuspecting users. The malware may lock the device or export data and passwords directly to the scam."Image and text from Los Angeles County District Attorney's Office. Helpful hints at the link, via Neatorama.