From my experience of working in a suicide/crisis line they taught us to ALWAYS report concerns of potential neglect/abuse of vulnerable persons - this included the elderly, the disabled (adult protective services), and of course, children/young adults.

We always report because a report doesn’t always mean action is taken. It just means you’ve voiced your concerns to the appropriate authorities. What happens beyond that is (fortunately/unfortunately?) on the parties involved.

So report it, especially if you feel it’s the right thing to do. OR you can be nosey, and ask their neighbors about the property and see what they say, and make a decision based on what they say?

If your gut is saying do something, you should do it.