This is very true. What we need is a readability-type program that will alter a stylesheet to red/green/grayscale at night. The problem is that it wont always

This is very true. What we need is a readability-type program that will alter a stylesheet to red/green/grayscale at night. The problem is that it wont always work - if someone uses a gaudy background image, it's still going to look like crap if you use a plugin to change the CSS.