"I went over to Althouse’s and wrote a number of insanely offensive comments, but everyone started agreeing with me before I could declare 'April Fools’!'"

Oh, bullshit! No one agreed with you. They just didn't let you wind them up like you tried. It was pretty obvious what was going on, but you did fool TBogg, a lefty blogger, who was so eager to believe the commenters over here are bad people that he was thoroughly humor deaf... even on April Fool's Day.

UPDATE: There are some strange levels of complexity to this, explored here.