not-admin writes "A little over five years ago, Comcast received some major consumer backlash for their policy of caching web pages that users requested, along with the IP address of the requesting user. It appears now that this policy has been reinstated, at least for personal customers. While this does make practical sense for an ISP, it is unpractical in many cases where site content is generated on-demand. In situations like that a cache can cause problems, making a site cumbersome or even useless. In the evolving "Web 2.0" world of today, is caching a practical solution for ISPs or just another hassle for the consumer?"