Things like Ring, Nextdoor, and Facebook already exist. Nextdoor and Facebook are riddled with inanity, from political rants to dumb jokes to hoaxes to common scams to law enforcement rants.
I don't want more information from my neighbors -- 99% of it is garbage. I want highly-filtered information. Basically, a neighborhood watch but with an aggressive spam filter. Right now I glance at the various neighborhood feeds with one eye closed, sifting through the intense stupidity, trying to capture valuable intelligence.
Of course, all of this may be a dumb corporate-run idea and maybe people should really focus on forming good relationships with their neighbors in meatspace and talk to them in person aka HUMINT.