I think some of you should reread the Master later... when you mature a bit (no offense.). Middle-Earth is one of the great gifts literature has given to mankind. And do try to read things like The Silmarillion; it explains a LOT of seemingly trivial events in LOTR.
For example, one small scene in the book (which also appears in the movie) has Frodo offering the Ring to Galadriel. After a scary speech by the Elf Queen, she regains her composure and declares:
"I passed the Test! I will diminish, and remain Galadriel.
Now I can fade from the world, and pass away into the West." (paraphrasing).
LOTR doesn't explain what she's talking about, but readers of The Silmarillion will recognize that she's referring to the Ban of the Noldor, the prohibition against returning to the land of the gods far off in the West. This Ban was placed on the hosts of the Noldor (High Elves) when they rebelled against the gods and sought to return to Middle-Earth to fight the Dark Lord Morgoth. So eager were they to go that a faction of the Elves led by Feanor seized the ships of their cousins the Teleri (Sea-Elves, who had refused them passage), murdering them by the hundreds.
Galadriel was one of the Noldor, and although she was not present at the Kinslaying (she was part of another group that came later), she too came under the Ban and was forbidden to return to the Immortal lands.
So by refusing the Ring, she was absolved of a VERY, VERY, VERY ancient crime. You wouldn't know this if you hadn't read the other book.