This isn't aimed at anyone in particular whose blog I read, or who I know reads this blog, but more of a general comment prompted by the reaction of a friend who just received a huge Battlestar Galactica season 3 (the current season) spoiler on Digg:
If you're talking about the current season of a TV show, or a recent book or movie, do NOT reveal plot points without providing adequate warning. Doing so can result in innocent readers having their enjoyment of said plot point diminished thanks to your moment of thoughtlessness.
I myself can be very easygoing about receiving spoilers -- for most shows, movies, and books I just don't care. (Harry Potter, for example, although I definitely in the minority on that one.) BSG, however, I care about. If I were my friend, I'd be livid right now.
If God is just, there is a special eternity of torment reserved for habitual spoilers.