Today I got a hit from someone trying to find out the meaning of the joke: "Where are we going and why am I in his handbasket?"
In order to understand this joke you need to know the idiom going to hell in a handbasket.
Thus the implicit meaning of the joke, which is usually on a t-shirt or bumper sticker, is that the person "saying" it so clueless that they don't realize that everything is going straight to hell. The "voice" of the joke comes off as rather innocent and trapped in their circumstances. Contrariwise, the people who display the joke aren't being innocent, they are being ironic and sarcastic. They are indicating that they *know* everything is going straight to hell.