Really? Look at the documentation page. The first thing you see is a huge chunk of text with absolutely no highlighting to guide you. Most people would just skim their eyes over that, and my attention gets drawn to the list of MIME types because it looks different.
A simple bold tag immediately draws focus and ensures that the huge majority of people who view the page get the important message. That's not being hard to please, it's just common sense.
I don't the person is being a pain. People will not heed a warning that is not clear and apparent. It's like the warning on the side a hot cup of McDonald's coffee. It's not paid any attention if it's not really, really, ####-->REALLY CLEAR<--#####.
Maybe we should add some <blink> and <marquee>?