Quick reminder of the article that sparked this thread in the first place: some schools are turning perfectly good single sex toilet facilities into supposedly unisex facilities simply by putting signs up, while the toilets themselves still contain cubicles with gaps top and bottom.
Not surprisingly, girls hate this (my boy would also hate this). As a result they're avoiding going to the toilet, resulting in dehydration and possible UTIs. That is the issue the article documents - not toilet avoidance for other reasons.
So can we stick to the topic? How best to stop schools enacting such a terminally dumb policy when it should be self-evident it's to the detriment of their pupils, particularly the female pupils.
Letter writing campaign to the secretary of state for education, anyone?