I'm happy to be fifth (!) author on this thoughtful paper at CHI by Madiha Zahrah Choksi and Marianne Aubin Le Quéré on how Nextdoor users surveil their neighborhoods. (Spoiler alert: there's a lot of anxiety about petty crimes, and it's related to gentrification.) Some very clever research methods and some very interesting findings.
Under the (Neighbor)hood: Hyperlocal Surveillance on Nextdoor
https://dl.acm.org/doi/10.1145/3613904.3641967