I find that people who don't capitalize, especially their names, tend to lack confidence in themselves. So in a way the lack of capitalization actually makes a point.

The other reason may be that he sees capitalization as unnecessary as punctuation already performs the same task (akin to the JS semi colon debate.)

Personally, I find it a bit arrogant to ignore such a basic grammar rule, but it does not bother me so much as to not read it.

I would like to know his reasoning behind it.