I agree about sarcasm. 1der has been good about identifying its use in his posts, though having to identify sarcasm deflates it.
Bottom line, it is very tricky to use sarcasm in print, especially when so many readers here are quick to take affront and slow to give other folks the benefit of the doubt. Sarcasm and other witticism are fine things, and I love them, but they come across much better when spoken amongst people who already know your point of view.
This seems a good time to make a plea for folks to take a moment to breathe before they fly off the handle at some remark. Is it possible - oh, this is far fetched, I grant you - that perhaps there is room to give the benefit of the doubt to the writer?
As Carly Simon would say, I bet you think this post is about you.