I would love to see someone try to use HN at 9600 bps. That's bits per second, so 9600 / 8 = 1200 characters per second, roughly.
Also, you don't really need to configure a browser - just use lynx, which will ignore most of the bandwidth hungry aspects of a site.
The text on the current top story (the Wright Brothers article) is about 11kbytes. That doesn't include any html or css or anything else. That would make a page load at over ten seconds just for the text.
The point isn't that it can not be done, but that people would not tolerate it unless they had a real need.