^^ I might think that, but particularly now, with crazy work arrangements, kids at home, boarders who can’t go home, I would be a bit more generous. If your kid is accepted here and is interested, dig deeper for sure, but I would not write off the school for one potentially bad apple.
It’s possible this AO is indeed checked out, but depending on work arrangements, the AD might not know (which might not be the case if they were all working in the same place.)