I read all the stories on Free Republic. Don't remember too many details. There was a group from England who had just come from volunteering at a camp (or something) in Florida. Another few were from Australia. Yet another story was about a guy from Germany. All the stories were remarkably similar - especially what they said about the evacuation centers. They reported that the girls were unable to go to the bathroom without the guys protecting them. The young men built barriers around themselves with chairs, keeping the girls at the center. They reported a lot of violence and all told of racial insults and threats and how someone from the National Guard rescued them and got them to a basketball court or another room.
I've read several stories on FR, too. None involving the police demanding people to expose themselves. This article was the first that I noticed. In all the stories you mentioned, none of them referred to the police being the source of the violence.