a) If I know it will greatly hurt one of my friends. Like, I would never write about this one thing of Dora's that's she's very sensitive about. Its initials are FB.
b) If it greatly violates someone's privacy. Like, I would never write about this one thing of Dora's that's she's very secretive about. Its initials are MM.
c) If it would offend my mom. Which is why I don't use GD or bitch on my blog. These things offend her.
Anyway, I love this cartoon strip, xkcd. This is my favorite cartoon from their series because I hear about my "future employers" all.the.time. Check it out here. I heard about the series from Mr. Lady.