Cellar I apologise and hadn't meant to minimise. I actually hadn't read the reports of rape, merely the touching.
I still think it was unlikely to be organised though. Friends maybe got the idea from friends through texts/social media, but I can't imagine it was planned beforehand - this is mainly based on having lived in the middle eastern region for many years and being married to a muslim man from those cultures. We are according conspiracy theories where I think what we actually have on our hands is an unstable powder keg if you like, of poverty (hence the robbery aspect), misogyny, a skewed view of western women's morals, a terrible lack of education, and a set of cultures where men are very much pandered to and therefore grow up with a fair lack of self-control and self-discipline. One man distracts a women by assaulting her and manages to rob her, and another sees that going unchecked by other men nearby, and assaults another woman, and in the dark, in a crowd, another sees an opportunity, and so it goes on. Horrible. Pack mentality, which they do not have the education to recognise or the self-control to stop.