1. A device for perceiving, processing and responding in real time to a demonstrative behavior of at least one unmarked participant, said device comprising: means spaced from at least one unmarked participant for distinguishing the participant from a background; means for imaging each distinguished participant and providing an image thereof; means for digitizing said image provided by said means for imaging; means connected to said means for digitizing for ascertaining features of the digitized image; means connected to said means for ascertaining for identifying at least one characteristic of at least one of said ascertained features, each of the identified characteristics being a selected one of a location and a movement of a respective ascertained feature, said means for identifying providing a control parameter in response to the at least one identified characteristic; means responsive to said control parameter for processing said ascertained features of said digitized image to provide a signal indicative of a demonstrative behavior of said participant; and means for responding in real time to said signal indicative of a demonstrative behavior of said participant.