That would be one of the kludges I mentioned earlier, it doesn't fully remove the dialogue and it also effects the surrounding soundtrack but it might be possible to massage it beyond the point of annoyance.
I wouldn't want this thread to be too side-lined with that sort of thing though because there are obviously people here keen to play with the possibilites of voice characterisation and I was just suggesting a mini-project for people to experiment on if they want to.