Josephus, "..having men women and children in the same waiting line from what I've seen at self standing toilets at events poses abuse"

Too right!

It would be the same as the queue for the council buses, where the women are all elbows and bad manners, shoving themselves in front of all comers, pregnant women, the elderly and men of course.

A thirty-something woman who wants HER seat is a force to be reckoned with and no hostages taken!

Perhaps a line of squat toilets for them since they are in such a hurry. As a bonus the squat toilets would inhibit them getting comfortable on the throne while others wait. Besides, squatting is 'multicultural' and therefore tres 'progressive'.

Having just returned from a couple of months in India where the squat is the preferred model, I must endorse its use; no worries about the seat or 'mobile dandruff'.
OTB is right, no one lingers, especially in trains.