If you haven't seen Jon Stewart's riff on "The Cavuto," a question mark used to soften an outrageous claim with a veil of uncertainty, then you might enjoy this video:
We don't think The Cavuto has much chance of catching on, but is a good reminder of how punctuation can sometimes be abused. This is the equivalent of asking, "When did you stop beating your wife?"
In a way, it's similar to the misuse of quotation marks. Sort of like Jon Stewart calling Jim Cavuto a "journalist."