Is this even legal? I mean, if you have a website in the public domain, are you even allowed to restrict access to people who sign up to certain ISPs? Would another company be allowed to block phone calls from people who have certain phone lines? The internet, honelines, are a national utility, there should be no prerequisite of having to get certain ISPs to access content. Fair enough if you need to pay to get premium content that's a different matter. I think if you challenged it in court it could fall down.