1. A method comprising: receiving a first image captured by a camera-equipped device, the first image depicting a subject from a geolocation; by reference to said geolocation, identifying plural textual descriptors related to the first image; processing said textual descriptors in discerning whether the first image depicts a subject that is likely of a first class or a second class, said processing being performed by one or more hardware processors configured to perform such act; and taking an action dependent on whether the first image depicts a subject that is likely of the first class or the second class.