Adding a bunch of Wood Elves from Lorien to the battle of Helm's Deep (it's not like they would rather stay and defend Lorien) was even more ridiculous and pointless than having Faramir bring Frodo and Sam to Gondor, or the merging of Eomer and Erkenbrand.
While watching the TT I sometimes wondered if Jacksson hasn't watched Raph Bakshi's cartoon version from 1979 one time too many.
If it wasn't for Ents or Gollum this movie would be a total pukefeast. Sad when effects must rescue a bad movie adaption.