More than 600 East Bay households were fined for exceeding limits on water use during the latest billing period — the second consecutive billing period in which fines have been issued — exhibiting behavior that water officials say is not only a violation of drought policy but bad for everyone in the region. Among the customers with heavy water consumption were 24 Hour Fitness founder Mark Mastrov, former NFL running back Maurice Jones-Drew and retired Warriors basketball center Adonal Foyle, all of whom were also fined during last decade’s drought for using too much. None of the three could be reached for comment. The East Bay Municipal Utility District on…