Actually, if everyone was a JW then it's true, there would be no crimes ...... well, there would be no police officers (not allowed) and if anyone did do something, however insociable, then it would not be reported and would be covered over.
Everything would appear to be ideal. At the end of the day, all they care about is appearances so they would have their 'paradise'.
Now, that is true to the point that it is almost terrifying....