Nextdoor is such a cesspool. The crazy paranoids that have now been tooled by cynical players connect on there and reeinforce their delusions.

In the old days, they would crank out some hair brained conspiracy and be mocked and learn to keep it to themselves. With the internet they find each other and provide emotional support and reinforcement.

That guy they don't recognize on the street? Antifa death squad coming to rub them out for their dumbass facebook posts clearly.