What are the (demographic) groups to which you refer?
Interesting how Vlad simply wants to pigeon hole us all - for example if you are a white, male, atheist, middle-aged, humanist, yoga-enjoying, environmentalist, vegetarian.
So you need to be represented by.
1. A white person special interest group
2. A men's special interest group
3. An atheist special interest group
4. A middle aged person's special interest group
etc etc
Well, of course in many cases these groups simply don't exist, but even if they did why would they represent me unless I've actually chosen to be a member of that group - they don't.