As the provider of the overall service/experience, the major issue that their clients should have is that they might not be actively letting renters/users know

As the provider of the overall service/experience, the major issue that their clients should have is that they might not be actively letting renters/users know of the risks and advising on the steps that can/should be taken if their Wireless network is intended for privacy sensitive material (e-mail login, credit card, etc).