FON is a network where each participant can share their wireless access point with other members (and in turn is allowed to freely use other members’ access points) and where members can also make money from paying users (those who aren’t sharing members of the network). Its a neat idea that can help expand out the number of “free” access points. Problem is that it doesn’t warn people that sharing their APs may violate their service agreement with their ISP.
For example, the Sympatico service agreement states:
Your Service is solely for your personal and non-commercial use; without limitation, you may not use the Service or any equipment provided in connection with the Service for operation of an Internet service provider’s business or for any other non-residential purpose.
Verizon’s terms of service agreement states:
You may not resell the Broadband Service, use it for high volume purposes, or engage in similar activities that constitute resale (commercial or non-commercial), as determined solely by Verizon
Other ISPs typically have similar restrictions in the contracts.