Would anyone else be interested in seeing an ASDIC Age v. M/F/Total demographic graph besides me? It could be a living document addition to the community section. With nearly 4200 members, this could be an interesting plot.
A lot of members like their anonymity. You would probably have to make it voluntary which would make the actual cross section of the site inaccurate. I personally don’t want my age displayed.
Also, you would have to compile the data yourself. From previous suggestions I’ve made and seen, Moo doesn’t like extra work. 
Numbers on a graph do not threaten anonymity. There is no way to correlate a specific individual’s age with their contribution to a point on a graph. I cannot do this myself because as you have stated, many people do not show their age, nor does everybody post. If the graph has a span of 70 years with nearly 4200 members, that is an average of 60 members per year. Once created, this graph should self maintain.
We don’t generally provide such stats on our memberbase.