Be careful what you wish for...

[malkatoj]

I wish Hobbits could fly.

Your wish is granted. Hobbits can now fly. Out of pride for his newfound ability, Frodo attempts to fly to Mount Doom to destroy the ring. Legolas sees him when he gets to Mordor with his awesome elf vision, assumes he is something evil because nobody knows yet that hobbits can fly. Legolas shoots Frodo and the ring falls on an orc, who brings it to Sauron. Middle Earth has been destroyed.

I wish Merry and Pippin had created the rings.