The spirit of the maze
Ok - its just a movie and a pretty poor one at that but...
the Unicorn blade was supposed to only be taken out of the maze by a true hero. In fact, that was emphasised by the spirit in the heart of the maze.
But then not only does the spirit of the maze let Thaddeus take the sword - perhaps the worst questing knight ever in history - but the spirit of the maze basically talks him into it...
So, I guess my issue is, how craven and crass must that dead guy have been if Thaddeus was worthy and he wasn't?
"They who... give up... liberty to obtain... safety, deserve neither liberty nor safety."