Oh, I do sometimes have difficulty showing the difference without using an emoticon or writing "haha" or something. This is basically why I do not take offense and am just explaining and apologizing for the misunderstanding.
All I can really say is that when I sound like a slightly-crazy person, I am probably being sincere. When I sound like I am a panelist on Bizarro O'Reilly Factor, I am probably playing off my own slight-madness for comic effect.
I... I dunno. In text and standing outside of my own head, it is not necessarily easy to parse, I guess. Just assume that if I am being particularly crazy-sounding, I'm probably kidding. It is probably best for all.
(Also, it helps to remember that I actually only get that worked up about manners of religion and politics. If I am doing it about less life-and-deathy things, I am just fuck*ng around 99.9% of the time. I do not actually, for example, believe that Billy Joel and Bruce Springsteen were roommates at Yale, were in Skull and Bones together and regularly have money fights on their yachts. I do, however, enjoy the idea of that kind of a world to no end.)