The moral of the story is know your rights
That's the real moral of this film. I think that it's pretty terrible that the majority of people in this film were unable to realize that the man on the end of that line was not a police officer. I'm not a police officer or a lawyer or anything like that, but I think that any person should realize that a person calling you randomly and accusing someone of a crime without producing any direct evidence, without showing up themselves to investigate the crime and then asking all these random people to strip search a girl and perform all these weird and degrading sexual acts on her is probably not a real police officer, and if they actually were real police officer, I would ask for their badge number so that I could report them for such unorthodox and clearly violating procedures.
The worst part was that pretty much everyone went along with it even when it got to the point where it was ridiculous. Asking them to make her do naked jumping jacks in hopes that the money would fall out of her ass/vagina or something, asking to describe what she looks like naked and what her nipples look like or spanking her for not calling the person doing the interrogations Sir should make you realize that something is not quite what it seems. If anything the girl should have asked to see some credentials before going along with all of this. So although I can sympathize with what she had to go through, it really was partially the result of her own ignorance of the law.
This is why I think that every school should have a course teaching people their rights, or at least a program or something like that. But even then I am sure that most people wouldn't pay attention and would swiftly forget it. There is no real way to cure human ignorance and this is the consequences of people blindly obeying. The sad thing is that this will probably continue to happen again and again and people will continue not to question and the people perpetrating these frauds will continue to do it and get away with it.