Your ISP is not responsible for ensuring that the connection they give you works to access any particular sites (see, for example, all the sites that already implement geo-fencing to block or alter the experience based on country of origin).
And if the blacklist is on the upstream provider? So you literally cannot send packets beyond your residential ISP? Have fun surfing the comcast homepage.
Your ISP is not responsible for ensuring that the connection they give you works to access any particular sites (see, for example, all the sites that already implement geo-fencing to block or alter the experience based on country of origin).