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Still, if Comcast is going to throttle specific websites, or charge specific websites for faster connections, can't we use the knowledge that a website visitor is a Comcast subscriber to our advantage?
More than that, could Reddit use a protest day to demonstrate what may happen to Comcast customers?
For example, instead of a blackout day, Reddit loads slow for Comcast subscribers and only Comcast subscribers.
For programmers, here's a possible solution using PHP: http://stackoverflow.com/questions/855967/how-do-i-retrieve-the-visitors-isp-through-php