Verizon DSL customers can buy wireless gateways with their home Internet service, and provide free tech support for the wireless sharing, because "most people say they want this." Amazing to see a big biz that plans to give its customers what they want. AT&T Broadband has a similar service, but weirdly enough, their Acceptable Use Policy forbids you from using it:
(ix) resell the Service or otherwise make available to anyone outside the Premises the ability to use the Service (i.e. Wi-Fi, or other methods of networking). The Service is for recreational, residential, personal use only and Customer agrees not to use the Service for operation as an Internet Service Provider or for any other business purpose
Verizon's Terms of Service are ambiguous on the subject:
A. You may not resell the Service, use it for high volume purposes, or engage in similar activities that constitute resale (commercial or non-commercial), as determined solely by Verizon Online.
When I asked the press-contact on the press release for the service whether this forbade war-chalking your network, she didn't have an answer.