Michael Haykin has decided to keep the ALL CAPS TITLES on his blog - See Historia ecclesiastica
He offers an excellent reason (Design. It just looks better. I think I agree) and a fine argument from Gordon Woods who applied net courtesy with more wisdom. All Caps is not a Sin. Plus, he is not writing the titles to or at people - that would be yelling. So, for the sake of design and good looking headers I conceed the point. Just use all caps with wisdom within posts and comments and never all cap anyone in e-mail unless you really want to yell.
Dr. Haykin is no yelling 21st century church historian - he just wants his blog to look cool. And I'm cool with that.