[quote=@Gowi]
<Snipped quote by BladeSS4>
Generally ANBU was its own rank that was neither chunin or jonin, but it can be presumed that they were [i]typically[/i] enlisted from jonin-level individuals as they are the elite task force of every ninja village. Itachi and Kakashi-types were very uncommon.
[/quote]

Yes, all ANBU characters were recruited from jonins or jonin level people.

[quote=@BladeSS4]
<Snipped quote by Buddha>

I thought the root was a faction of the ANBU? Although Sai is the worst example.  I would have said Kahashi when he joined the AMBU but I don't think they had the Jounin rank then.

Edit- Seems that was answered before I posted this.
[/quote]

ROOT was a secret organization that acted independently of Konohagakure/ANBU and I believe the elders didn't even have knowledge of ROOT's existence and/or activities.