Possibly the following rule is the problem:
"We hope you will find the vast majority of Gransnet discussions genuinely informative, supportive and friendly (even when we all disagree with each other!)"
But disagreement with an idea always implies lack of support for it!
One sort of discussion is objective and explicit , For this sort of discussion heated arguments are appropriate , and a main function of a mod may be to steer the arguments towards the original proposition or question. When important ideas that are close to her heart are being discussed it's always a risk that a Gran will feel unhappy or even insulted if her ideas are unpopular or disputed. Except for illegal material these objective discussions should be uncensored. There is a problem with labelling these psychologically risky , and I wonder if Gransnet's philosophy can cope with debates on certain topics such as religion or politics.
Then there is the sort of discussion on Gransnet that is purely for moral support and kindly advice for someone having a bad time . These discussions that I have read are above reproach as to their helpfulness, kindness, and tactfulness, and are very well moderated by the participators themselves.
The remaining sort of discussion on Gransnet, practical matters, hardly needs any moderating. Gransnet can be truly informative because older people have such a slot of experience in practical matters of all sorts.