Maybe I’ve just seen some particularly toxic shit on NextDoor, but I’d be scared that by posting there I’d be putting my friend at even higher risk. Like there might be people who wouldn’t have happened to see him during his visit if I hadn’t said anything, but now that they know he’s coming, they’ll be waiting at their window while holding their phone, with the police set to speed-dial.

IDK. Maybe there’s NextDoor communities that aren’t awful. But the one I used to be in sure was, and I spent way too much time getting into debates with NIMBYs that never changed their minds. I’ve heard similar awful-NextDoor stories from too many people to believe my experience was an anomaly.