What is the test for reasonable expectation that a person with mental health issues will not be harmed by a stranger?

At para. 15, she added: As stated in Tame v. New South Wales (2002), 211 C.L.R. 317, [2002] HCA 35, per Gleeson C.J., this "is a way of expressing the idea that there are some people with such a degree of susceptibility to psychiatric injury that it is ordinarily unreasonable to require strangers to have in contemplation the possibility of harm to them, or to expect strangers to take care to avoid such harm" (para. 16). To put it another way, unusual or extreme reactions to events caused by negligence are imaginable but not reasonably foreseeable.