Hi, im new to the forum and all that stuff, so sorry if this has been discussed to death.

If I remember correctly, at the very start of Naruto, when he steals the scroll of the forbidden seals (or whatever it is called), why is Kage Bunshin No Jutsu in there?

The 3rd was very worried because Naruto might have performed a jutsu to unseal the demon fox, but I dont see why Kage Bunshin should ever be banned as it is on the whole, quite a lame jutsu.

Also, if it is a forbidden jutsu, why is it that every single Jounin can either do it or knows about it.