1. A system for controlling screen saver activation and functionality, comprising: at least one client station, each of the at least one client station comprising at least one processor and storage medium implementing a screen saver module associated therewith, wherein the screen saver module is operable to at least enable/disable or activate/deactivate a screen saver according to one or more parameters that vary according to a pre-set schedule specifying when a screen saver is to be enabled or its activation behavior is to be changed, wherein the pre-set schedule is determined based on expected user activities on said at least one client station during one or more particular days and times; and a central control station in communication with each of the at least one client station over a network, the central control station having a screen saver control module operable to transmit at least one control signal over the network, the at least one control signal including at least part of the one or more parameters to control one or more screen saver modules associated with the at least one client station; the screen saver control module further comprising: a global control module for simultaneously controlling all of the screen saver modules associated with the at least one client station; a local control module for controlling the screen saver modules of select client stations; and at least one of: a temporal control module for defining when the screen saver modules enable/disable or activate/deactivate screen savers according to at least one temporal parameter, the at least one temporal parameter comprising the pre-set schedule specifying when a screen saver is to be enabled or its activation behavior is to be changed, and a connectivity control module for controlling the screen saver modules according to at least one connectivity parameter that changes activation behavior of the screen saver based at least on whether the at least one client station is connected to a network.