Levy Limits Scout Events In the Schools
New York City Schools Chancellor Harold O Levy bars public schools from sponsoring most activities of Boy Scouts of America, saying Scouts had violated Board of Education policy by discriminating against gays; Scouts will still be able to use school space after hours; there are 7,000 Boy Scout and Cub Scout groups, but it is not known how many are sponsored by schools; chancellor's decision is seen as symbolic blow and is hailed by gay rights groups (M)