The first commenter will post a wish. The wish can be anything in the world that they can think of, there are no limits to what you can wish for. The following commenter has to take that wish and turn it into a negative then make a wish of their own.
I wish the world was made of ice cream
The world is made of ice cream, unfortuanately you suddenly become lactose intolerant and have to spend the rest of your life living in a bubble staring at all the delicious ice cream you can't eat.
(insert new wish)
I'll start: I wish that New England didn't get so cold in the winter.