Separate toilets really annoy me. They've been a pet hate of mine for years, since I was chased out of the ladies while trying to tell a girl friend of mine a story while she fixed her make-up back in high school. They are the last bastion of apartheid - segregating people in exactly the same meaningless way as having whites only entrances. The fact that no one has noticed this means there's either a male conspiracy afoot to relegate queueing to women only, or women are paranoid that unisex toilets would become iniquitous dens of sex and sin.
But I get that the world moves slowly. The kind of blunt compartmentalising of people that characterised apartheid and nationalism and feminism and marketing is giving way to an enlightened view of human nature. The digital era is making crude generalisations obsolete. Media channels are fragmenting to an almost individual level, people are forming communities based on interest and passion rather than geography, and marketers are realising that it's better to speak to people when they are interested in you. Demographic and psychographic profiling is all well and good, but most of your messages will miss their target, unless you're targeting those who are searching, seeking, speaking about your product.
In short, the age of demographics is over. Why bother trying to predict behaviour based on crude generalisations about groups of people? People choose what groups are meaningful to them, and they may be nothing like the groups you think they belong to. Now you can track actual behaviour of individuals online. It's increasingly obvious that our identities are not about "who we are", but rather, "what we do". We're free to be ourselves, to define ourselves by our actions and interests, and not be boxed in by descriptors.
And is it really fair, in the age of the empowered individual, to tell us where to pee or who we're allowed to converse with at the basin?