At an environmental demonstration a petition was passed around to  ban dihydrogen monoxide, Hundreds of these WELL INFORMED LIBERAL GREEN PEACERS promptly signed the petition, this evil chemical was told to members of the demonstration that is was all pervasive, used in nuclear reactors, could be found in lakes and rivers, was actually found in our kitchens now, needless to say the crowd was outraged and lined up to sign the petition calling for the banning of this evil substance also known as:    

WATER, YOU MORONS!

This prank was brought to you courtesy of Penn and Teller and can be found on U tube.