The moment they were created, Bradford Buzzard and F.O.W.L. should’ve educate May and June on the flaws of Clan McDuck and those who are in close contact with. It involves showing them past incidents (Shadow War, “Timephoon!”, Moonlanders’ Invasion), and how these are connected to the McDuck family by thinking they are the cause of these that almost led to the world to the brink of destruction. That can help make May and June reject the family and think they’re too dangerous to exist.