Is JJJ your real name? The problem is that even if someone posts their real name how does the members know it is their real name? 
It's a nickname. But as a link to my website and contact details are in my signature and profile, I'm hardly anonymous.
I don't expect people to post all their bank details, but a link to a working website showing that they are actually a photographer and not simply a keyboard warrior is hardly a big barrier to taking part.
Seeing people's work can also give context to their posting. One thing I've noticed is that those who are cannot do good post processing, tend to slag off PS as cheating/not real photography.
And if say you are debating about how to do good nature photography, a stunning portfolio of animal shots may give you more credence than someone who is a studio photographer.