1. The cab driver in Roman Holiday.
    Strange man takes obviously drugged young woman to his home after literally slapping her face in the cab. Cabbie does threaten to call the police. The man is spurned into action, obviously not wanting that, and takes the young girl into his apartment. Cabbie drives away.
  2. The landlord in Roman Holiday
    Landlord receives a call from a tenant asking him to confirm whether or not a young woman is still asleep in his room. She is; it's past noon (strange? Is she okay?). The tenant asks the landlord to guard his door with a gun and prevent the woman from escaping. The landlord complies. Later the landlord has suspicions that the tenant is actually a pimp. He takes no action.
  3. Basically everyone in Roman Holiday
    Why don't they recognize the princess with this bum?