That’s true. I guess in that case I’d look at the percentage of FB’s as a function of the number of units total. Then I’d look at the length of time most people have lived in the complex. People who have been there long are IMO less likely to walk. If you have a good portion of the complex being long-term residents, I’d say things are pretty stable.
I’m not sure how to find out online how long people have been living there, so it’s a good argument for going there and talking to people.