I'll go on record and state that anything of mine that qualifies as a "rant", or anything that is specifically related to Discordia and/or the culture of this forum (my Doktor threads, for instance), is Kopyleft.
Anything else I write may or may not be, you should probably ask. I'll most likely say yes.
Notable exception: Bring and Brag. If I put something in there without specifically saying it's Kopyleft, assume it isn't. If you really, really want to use it, go ahead and ask, but the answer will probably be no.