Quote Originally Posted by Narasho
That isn't strictly true, unless the Sound Four were Jounins (While they didn't defeat Anbu persay, they did neutralize Anbu). Also, the only times Anbu did anything useful were saving Anko from those Lions during the Chuunin Exam, and the counter-attack on the Sand Village ninja during the invasion of Konoha.
False. The Sound Four were Chuunin Level. Kimimaro probably was Jounin level though.

Their technique stopped the ANBU just because it burned them, but the technique persay is kinda useless if you are not guarding someone/something. You can not use it on battle.

They defeated Genma and the other guy (Aoba?) because the Jounins were tired from a mission, it was 4 on 2, and the Sound Four used their 2nd Lvl curse seal.

ANBU's aren't useless. They are simply ignored by Kishimoto. Its like saying every other nameless genin/chuunin/jounin/tokubetsu jounin are useless because they do not appear.