They seem to be tools for those with sharingan dojutsu & prisoners of those with a strong body. But in a way they're not anymore because Rikudou Naruto ain't lettin that happen again as long as he's alive. Sasuke would be the only1 to pull somethin like that off again based on the first time he did it and they did say that thing weren't finished between them so yea!!!..
They say be careful what you say else it may come back to bite you :bdpf: like all the back tracking sasuke fanboys had to do on borrowed/outside powers once sasuke had to rely on 9 bijuu chakra.
The bijuus hagoromoo created are slaves to almost anyone coming down from his descent.
-Sasuke, Tobi, and Madara ragdoll them with their eyes
-Hashirama subdue them as pets
-Mito and Kushina pinned one like nothing too.
However they aren't slaes to only with dojutsu, they can be enslaved to those with great fuuin jutsu also like uzumaki chains, or jinchuriki in general.