That’s a fair point actually. Sometimes I forget how fucked up some people are. A ban would not necessarily help tho, because you can reverse or overturn an adoption under certain circumstances. So you could still groom all you want and then try to convince your adoptive child to leave the family and marry into it again (or maybe even force them somehow).

I think probing for grooming/wellbeing of the child might be a better way to handle this overall.