Mystery

I've been spending (too much) time on various message forums, and I have encountered a mystery. I understand some people can't be bothered with capitalization, so they write like e.e. cummings: "i have a question about..." And of course there are the usual shouters who have never been online before "I HAVE A QUESTION ABOUT..." but the ones I find most mysterious are the all initial caps: "I Have A Question About How We Add Signatures To Our Posts..." I mean, that takes effort to do (unless there's a shortcut I don't know about), and it just looks...weird.