NEW YORK LAWSUIT OVER ADULT HOME
New York Atty Gen Eliot Spitzer sues former operator of one of state's largest and most troubled adult homes for mentally ill; seeks $12 million in damages to compensate hundreds of residents of Seaport Manor in Canarsie, Brooklyn, who were subjected to what state lawyers describe as years of scandalous care and deplorable conditions; lawsuit is milestone in oversight of New York's adult homes, which were once considered promising alternatives to grim phsyciatric wards that state began closing in 1960's; mental health experts see them as little more than sprawling flophouses that keep mentally ill isolated from society; they are so loosely regulated that they have often faced only modest penalties even after state inspectors cite them for grievous violations; Spitzer's office began investigating Seaport after home was focus of article in The New York Times last spring; Pataki administration, which did little to punish Seaport's operators, moved to revoke their license after Times article; home is now nearly closed; Seaport operators named in lawsuit are Baruch Mappa, Martin Rosenberg and Emil Klein; former administrator Esther Elizabeth Rosenberg is also defendant in lawsuit, as is assistant administrator Seth Fried; photos (M)

