GRAPEVINE, Texas -- The Boy Scouts of America threw open its ranks Thursday to gay Scouts but not gay Scout leaders -- a fiercely contested compromise that some warned could fracture the organization and lead to mass defections of members and donors.Of the roughly 1,400 voting members of the BSA's National Council who cast ballots, 61 percent supported the proposal drafted by the governing Executive Committee. The policy change takes effect Jan. 1."This has been a challenging chapter in our history," the BSA chief executive, Wayne Brock, said after the vote. "While people have differing opinions on this policy, kids are better off when they're in Scouting."