Sparkling it's talk about all over the Internet. Not just mumsnet.
As said, people process things differently. And that's fine. What's not fine is telling people your way is the right way and that theirs are wrong.
I think we get you don't like it and feel it's distasteful, but you need to accept other process things differently to you and have a different opinion. People shouldn't be made to feel bad about this,
As a pp said, if you struggle with it, then for your own mental health it is maybe better to stay off the threads, people are behaving respectfully. Anything disrespectful needs to be reported, but discussing it in itself is not disrespectful.
Right now it's being discussed everywhere, from the media, to social media, to Internet forums, to celebs, to friends, to acquaintances. It really isn't just mumsnet that people are discussing it.