Nextdoor is known to be platform that enables bigotry and perpetuates racial stereotypes. Nextdoor, not forwarding bullshit suspicions to the police, is the least they could do since they created the fucking problem to begin with.
It encourages one to view everyone who you don't immediately recognize as an outsider, causing you to fear them, and then share that fear with others so they too can be afraid. It's absolute madness, and I haven't ever heard a good thing in the real world about Nextdoor. I have had people assume my race incorrectly though, and gleefully admit their racist usage of it not knowing what they were about to say would be considered so fucking awful...
The big advertisers have been Ring and security companies, so they tend to attract people worried about other people. They suppress things like political posts, so there really isn’t anything to do but worry about lost cats or busybody crap.