I've asked this question a lot over the years and no-one seems to have the answer but, how did the idea that Mumsnet was ever a 'safe space' on the internet come about in the first place? I think it’s likely from when MN was a much smaller forum, and because they had a comparatively small number of users, everyone knew everyone, and so one poster’s plight was common knowledge and people stood together iyswim.
So when a poster lost her 2 year old to SIDS there was a mn collective called “Mile for Maud,” where posters walked a mile to raise money for a SIDS charity.
When a poster’s DH had a heart transplant, we had been following his journey through heart failure and the need for transplant, and the belief it would never happen, for several months. And so when he got the call everyone was watching in hope that he would pull through. I even PM’d my mobile number to someone to call me if there was news.
Another poster had a DH who was dying of a brain tumour, and again mn’ers rallied round, did collections for her, sent her groceries etc as she was at home with him and three autistic children so things were understandably difficult for her.
One of the issues which came about because of this is the fact that people saw MN as a generous, giving site, and more and more people came here with their (fake) tales of woe, in the hopes that collections would be started for them too.
And more and more posters came here, and the number of known posters dropped because there were so many.
So in essence, it was never a safe space, but it was a much smaller one, where many posters probably felt more secure in posting.
But those days have long gone.