Somewhat understandable - grief can make people extremely irrational, and her mother had only recently died. She also felt somewhat responsible for her mother's death.
Then again, coming up with absolutely ludicrous plans seems to be Skeletor's entire thing, in both this movie and...well, pretty much everything else.
It makes sense if you consider that they're thinking in terms of conventional battle, in which lighting the fire would be a bad idea and putting it out a good one. They simply fail to take into account that the Wraiths don't exist or interact with their environment in conventional ways.
Additionally, at no point in the movie prior to this had it been shown that the Ringwraiths were afraid of fire. Frodo and Co. had only just learned of their existence and had no reason to suspect they would be vulnerable to anything in particular. The true Idiot Ball goes to Aragorn, who does know this and should have warned the hobbits that it could be used to repel them. (It is arguable that Aragorn's sheer badassery in combat is what chases them away, rather than just the fire.)
And the townsfolk are perfectly happy to shout "No! It's a trap!" from their doors, but apparently can't be bothered to oh, say, pick up the children and/or drag them inside?
Children are outlawed - picking up the children and taking them inside would have gotten them arrested, so taking no action beyond a verbal warning (itself possibly risky) is understandable.
Deleted the following "examples" that violated Conversation in the Main Page and Repair, Don't Respond.
Masters of the Universe
The Lord of the Rings
Chitty Chitty Bang Bang
- And the townsfolk are perfectly happy to shout "No! It's a trap!" from their doors, but apparently can't be bothered to oh, say, pick up the children and/or drag them inside?
- Children are outlawed - picking up the children and taking them inside would have gotten them arrested, so taking no action beyond a verbal warning (itself possibly risky) is understandable.
Edited by Arivne