I was on nextdoor and learned that Nextdoor is owned by an Indian. It's also India that is the source of many highly sophisticated hacks! The hacks often come through as an alert from your bank, something that involves one of your accounts, that has an unusually large charge. "If this isn't your charge please contact us immediately". They want you to contact them, slowly divulge your information, close your account and deposit it in Bitcoin or another account. They look soooooo real! DELETE THEM! Stay off of Nextdoor because it's easy to get details about you. When I tried to warn people in my neighborhood Nextdoor IMMEDIATELY banned me! If it wasn't true they would have argued the accusation.