Interesting. The residential home types here are called Residential Care Facilities for the Elderly and, at least the 4 I looked at ARE lock down facilities by design. They are very similar in design, with outdoor areas for residents, but surrounded by wrought iron fencing and secured gates. To use your description, residents WERE held captive and could not leave without a family member or staff member with them. That kind of is the whole idea. My mom was unusual among the 6 residents in the home I put her in in that she had had a stroke, and could not leave on her own, she could no longer walk. The other 5 were all Alzheimer's or Dementia patients and COULD have had problems if they walked away unescorted even in the best residential area. My mom's home had one very young, like late 60's, man with Alzheimer's who was very technically smart and found ways to disable the monitoring alarms and walked away several times in the week he was there. The RCFE owner finally had to ask his family to put him in another facility with more advanced security to prevent him from leaving.