I think there are many people in deep trouble, who have no one to turn to, who do not know where to go to seek help who will, in this day and age, look online for help and a forum with a name like 'Gransnet' sounds welcoming and sympathetic - and I think generally we are. You do not see on Gransnet those hate and expletive filled responses you sometimes see on other forums.
We often give practical help and advice, I forget how many times responders have been referred OPs to CAB, Age UK, ALAnon and a myriad other sources of help that the OP seemed unaware could help her. I also think people use the anonymity, a forum name gives them to seek help where they are unlikely to be recognised or followed by family and when they have exhausted/rejected/accepted our help, never accesses the forum again.
There were in early days various posts that one suspected came from the media or others looking for an easy story about the unforgiving, old-fashioned or entrenched in the past attitudes of older people. However since the responses the problems posted got were sympathetic, understanding and excluded all the responses the media trawler seemed to be looking for, these posts died out after a couple of months.
Most agony aunts have a loy of experience in dealing with people's problems and have an extnsive network of specialists and interest groups they seek advice from. The problems they deal with, though often based on one persons problem, are stripped of all corrobaitive detail and home in to the main problem. They choose problems that they know will mirror the problems of many readers lives and their responses do not automatically assume the writer of the problem is in the right and they are as likely in their response to be telling the writer that they are behaving unreasonably as to support them. The fact that one specific problem mirrored the exerience of a reader, from the other side of the problem does not necessarily mean that the writer was in their family. The fact that the agony aunt printed the letter showed her openess to another interpretation.
I enjoy reading agony aunts. There is, I know, an element of shadenfreude about it, but I have learnt a lot about standing back and thinking through other people's problems before offering advice or otherwise. It has made me far more nuanced in my attitude to other people and their lives.