[sgslo]

I know what you're trying to get at here, that forming a 'women-only' group is selecting against men by allowing them to join, and that selection isn't fair.

Cmon, be real. There are discussion groups that select against other parties. Some of these groups are socially acceptable (cancer survivors, people in debt, women's issues). Other's might not be socially acceptable (excluding people based on their skin color).

In this case, a group to discuss women's issues is socially acceptable to a majority of people. If you're unhappy with this standard then go campaign against it somewhere else, don't try to poo-poo the OP's app.