Interesting question

Well, it would depend on the trust level between the Dom and the sub. If the sub felt that they could trust their Dom enough to give them that kinda control, then they should go for it.

I, for one, would love to find a Domme who I could trust that totally. My thoughta might be a bit colored, since I have a capture & mind-control/brainwashing fantasy

I can see several places where it could be useful, not just in humiliation. How about training, ridding of bad habits, etc.