How did they know who she was ? If she had stayed anonymous behind a user-name they could not have criticised her face, husband and work.
Gransnet is not as feral as Mumsnet. Occasional spats, yes, but not the infighting and free-for-all insults that go on there. Later generations are more prone to say exactly what they are want, without weighing up the power of their weapons first.
In some ways that is good,freeing up the impulsive praise and support that makes the recipient stronger, but firing a virtual nuclear bomb at someone as a first reaction is a little extreme.