It is already very close.
When the software reviewed five images per person, it was even more successful – 91% of the time with men and 83% with women
The false negative (telling a gay person is straigth) chance is really low. The false positive on the contrary is higher. Considering 5-10% people are gay, at least 50% of man targeted as gay will be straight.
While the trend of LGBT rights and respect in most of the western world is promising, the situation in Asia and Africa is much different, and I fear this will take decades to change.
Oh, now i see where you are getting. The Witch hunt....