Spy camera voyeurism is skyrocketing. It is almost always perpetrated by men (my impression, although I'm sure there are stats to back this up). Mixed sex changing rooms and toilets make it easier for males to abuse women in this way, IMO.
www.independent.co.uk/news/uk/home-news/women-spy-cameras-hidden-public-places-peeping-toms-a8689626.html