I found this article at gadling and would love to share with you readers. I am not sure whether it really works because I have never give it a try. Maybe anyone who after reading this posting, experiment and share your experience. I am not sure whether it only works at airport or can be hacked anywhere there is a paid hotspots.
The writer by the name of Jerry guo wrote this, "How to get free wireless in any airport". He said he was sitting at La guardia airport and get online after paying $7.95 for internet connection. Quote from the posting; Add "?.jpg" after any website address. That's it. For instance, if you want Google, just type in www.google.com/search?.jpg/.
It is not legal since you hacking someones signal and business but I think who cares as long as he gets Free lunch.