1. A method comprising: capturing and storing a sequence of images depicting a physical scene; analyzing at least one image of the sequence of images; detecting at least one visual command appearing in the at least one image, the visual command provided by one or more persons depicted in the at least one image, wherein the visual command instructs a change in visual appearance of at least a portion of the one or more subjects in the at least one image; and obscuring the visual appearance of the at least a portion of the one or more persons in accordance with the visual command, wherein the visual appearance is obscured in at least one or more images following the at least one image in the sequence.