How do you save/deal with a plant going Hermie? W...

If you actually saw bananas/pollen sacks then you can try to pluck them out before they burst. If you can keep on top of it and manage to get all of them you should have a good normal harvest with maybe a few seeds. With other plants in there, I would honestly try to remove it and not risk pollinating the others. If some of the sacks have burst then it is very likely the other plants have already been pollinated especially if you have good airflow. If that has indeed happened just grow em out and deal with the seeds. A seedy harvest is better than no harvest. It may also not be a hermie. Pistils can go orange and recede for a number of reasons(dust, Too intense of light, drying out, genetics, etc). So if you absolutely don't see any male parts at all then it is likely not a hermie.