I have terrible eye-sightSo do I, but even then I prefer text sizes such as seen on HN, I don't like excessive scrolling and lots line spacing, or serifs for that matter. This new trend of websites with huge, fancy fonts is not for me, and it honestly never occured to me there might be more going on than just trading reading speed for pretentiousness; but I can't see through the eyes of others, so I'll just have to continue to make websites how they look best to me.
It's up to me to make sure it's resizable and not too hung up on being presented a specific way, but it's up to the web surfers to configure their browsers accordingly. To me that's kind of the point of HTML, that I can't know and shouldn't care how you read the site. A lot of websites fail real hard in that regard, but increasing their font-sizes won't fix the problem. You should be able to ultimately define how you consume the information... some people disagree, they'd rather make brochures; blame those, blame that mindet, and leave small fonts alone :(