Hotel's Free Wi-Fi Comes With Hidden Extras - NYTimes.com
The hotel’s Internet service was secretly injecting lines of code into every page he visited, code that could allow it to insert ads into any Web page without the knowledge of the site visitor or the page’s creator.
Reason #5 to not use hotel wifi. Luckily, we aren’t traveling much this year. However, next year I may have to get an iPad with a Verizon antenna.