Be careful what you wish for...

[Sleepy Ranger]

I wish the Ents would have done more in the War of the Ring.

The ents decide to do more. They keep walking and walk onto you, squashing you flatter than a pancake. A random hobbit decides to eat your remains.

I wish Spiderman was the Ring Bearer.

[Hookbill the Goomba]

I wish Spiderman was the Ring Bearer.

Your wish is granted, but he is a missunderstood hero and is shot in the face by Elrond.

I wish Hobbits could fly.

[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.