Gender estimation is a must-have feature in modern face detection / recognition software. However, I'm not sure where it is used in real-life besides targeted a

Gender estimation is a must-have feature in modern face detection / recognition software. However, I'm not sure where it is used in real-life besides targeted advertising or some toy applications as you mentioned. For now, we will leave it for our users to decide how to use this feature. Why did we added it? Well, "because we could".