Couldn't this be used to automatize fire weapon aiming?
Or worse : a laser beam aiming automatically to the eyes. It'd be quite bad since it'd be cheap and unlike fire weapons, lasers are easy to build or acquire.
How long until a mass shooting uses such technology?
Realistically, if you wanted to do such a thing, you could have used a Kinect for a long time. Even face detection would work in your example, and we've had robust and cheap detection for a long time.
So I assume that this is a movie-plot threat.
However, for a dramatic interpretation of your query, I suggest "Daemon" and "Freedom TM" by Daniel Suarez. The book shows groups using these technologies to great effect.
Or worse : a laser beam aiming automatically to the eyes. It'd be quite bad since it'd be cheap and unlike fire weapons, lasers are easy to build or acquire.
How long until a mass shooting uses such technology?