I know it sounds harsh, and I know that a lot of people still hold to the Roman maxim of speaking no ill of the dead, but I'm underwhelmed by the reasoning.
If every nurse reacted to misdirection or lies by killing themselves there would be no health service left. Patients and relatives of patients lie all of the time, give partial or misleading responses to questions and generally behave like jerks. Should nurses kill themselves when they've been misled or lied to?
What of her husband, her children, her family? Did they deserve this? Because she was fooled by a prank call? Did they think she was a disgrace to them? Unlikely.
How was anyone to know she would have this extreme overreaction?
There are now steps being made to involve psychologists to deal with post traumatic stress in hospital workers and to spot the signs of PTSD in medical staff especially in A&E.
Its also worth pointing out that in a substantial percentage of suicides there are no reasons given by the soon-to-be deceased nor any plausible rationalisation made after the fact. Why did film director Tony Scott kill himself, for example?
The natural reaction of people to an unexpected suicide is to blame someone or something when in fact nobody knows what went on in the mind of the person. That search for someone or something to blame, however tenuous the link, appears to be a human frailty that most of us have. That's a reason why tabloid newspapers sell.