About 90,000 sex offenders have been identified and removed from the social networking Web site MySpace, company and law enforcement officials said Tuesday. The number was nearly double what MySpace officials originally estimated last year, said North Carolina Attorney General Roy Cooper, who along with Connecticut Attorney General Richard Blumenthal has led efforts to make social networking Web sites safer for young users. Cooper said he wasn’t surprised by the updated numbers, and demanded that MySpace and rival online networking site Facebook do more to protect children.