Is the security guard in the lost community responsible for the elderly?

The old man is not responsible for the normal, and the old man is responsible for the abnormal. Because the owner enters and exits the gate without the consent of the doorman, if the old man is normal, he has the ability to ensure his own safety, so the security guard has no responsibility; Because it is one of the responsibilities of property managers to ensure the personal safety of the owners of residential quarters, when the elderly suffer from mental illness such as Alzheimer's disease, they are unable to ensure their own safety, so if the elderly lose their residential quarters, the security guards are responsible.