I have gotten several postal mail invites to the social networking service called Nextdoor.
Over the years the neighborhood has had other forms of communication going all the way back to listserv-style e-mail lists.
Every single attempt has been brought down by spammy realtors with burner phones, group bullies, or other such nonsense.
I might enjoy keeping an eye on things in this manner, but I’m not sure I’m up for the bull or the privacy giveaway.
Anybody have any success with Nextdoor?