I'm very happy that you all want to carry on because I was getting the impression (maybe the wrong impression) that everyone was going to leave the thread!
Who cares if some people think you are stupid/wrong/bad/whatever? Not everyone thinks that and there are plenty of people on here who don't. (This is directed at everyone and nobody in particular.)
I've been reading in the Buddhism for Mothers book about letting go of the idea of self image. I'm not sure if I completely agree with it yet but was shocked by the truth that we spend so much of our time working on feeling better about our self image and whether other people see us as good or not. Maybe this is time wasted! Working on how to feel better full stop seems more worthwhile than working on how to look like a better person to others.
It seems more worthwhile to try to dismiss what other people might think of us and concentrate on how we actually feel, how to feel better and how to live in a way that makes the world around us feel good. The book talks about observing all the emotions that are passing through you and observing what is going on around you in the present moment and when this makes you able to concentrate better the answers as to what is required in the present situation will come to you more easily.
I like the idea of an explanation of the purpose of the thread at the top of each one. We could also do reminder posts at intervals. We can self-police it by reading posts and if someone is using critical language we can remind them in a non-confrontational way that this thread is for empathy, validation, and positive suggestions and that when we want to be 'challenged' we will post elsewhere. (Sometimes I do feel the need to be challenged so when I do I will post somewhere else and accept that people might react strongly/judgementally/negatively.)
If people think it will benefit someone to challenge their own beliefs and want to say it on this thread, they need to find a way to ask them gentle questions to get them to question themselves without making them feel like they are being judged. If you can't find the right words to do this then say nothing.