Last summer, several students at the all-boys Landon School in Bethesda hatched what sources later described as a twisted idea for a fantasy league: They would draft girls onto teams and then tally points based not on sports scores but on sexual conquests the boys would make at a series of parties. The boys were caught before the first party took place, according to several sources. Asked about the incident, a school official said Wednesday that three rising freshmen received in-school suspensions at the beginning of the school year.