there's no doubt that sexual predation would be a big issue and that women would be the first victims of any violence, but it's just part of the greater concern over authority in such a small society.. who is in charge, how are rules enforced and misbehavior punished.. i'm not optimistic that a Mars outpost would be able to survive its own judicial system, for example.. or any of the prepper compounds.. they're sort of all guaranteed to descend into really barbaric circumstances socially..