Seems to be popular in various parts of California where home ownership is high.  It is also seems to be a haven for the &quot;worst&quot; type of neighbors who like to complain about everything and might be slightly racist. See &quot;The Jerks Nextdoor&quot; for a good overview of what happens way too often on the site: <a href="https:&#x2F;&#x2F;www.newsreview.com&#x2F;sacramento&#x2F;jerks-nextdoor&#x2F;content?oid=18884464" rel="nofollow">https:&#x2F;&#x2F;www.newsreview.com&#x2F;sacramento&#x2F;jerks-nextdoor&#x2F;content...</a><p>Edit: splat brought up a good point.  A lot of municipalities are using it as an &quot;official&quot; communications platform.