I nominate Paul Musgrave. I can stand six feet or more from most people's monitors and spellcheck over their shoulders, but this black on dark red scheme as of 6/22 is more than I can deal with. I shouldn't have to change my browser font size or monitor brightness to read a blog.
UPDATE 7/3: Mr. Musgrave has changed the text background for the main body, so that much is visible without technological intervention. The blogroll is still hard to see. (he must be ashamed of it because it doesn't include No Watermelons Allowed. This, even after I mention Evansville and plug a company from there...)