Just grant and corrupt the wish of the person above, and then you make your wish.
Example:
User 1: I wish I had a sandwich
User 2: Granted, but its got dog poo in it. I wish...
I wish for world peace.
Example:
User 1: I wish I had a sandwich
User 2: Granted, but its got dog poo in it. I wish...
I wish for world peace.