They see it as a reason for giving thanks for eliminating legacy admissions
At this point, unless state law says otherwise, each school defines legacy as it sees fit. More importantly, each decides what bump, if any, legacy provides
Some might include stepparents: others don’t. Some count grandparents; others don’t. Some might only count an undergrad degree; others count graduate and professional degrees
So in theory, an applicant could be legacy at three, four, five, or more universities