I can't think of many technological solutions to these types of problems - I say that because trying to ban those types of software generally is like playing whack-a-mole. You get rid of one and another one pops up.
The real solution is that people have to police themselves when interacting with technology - being judicious. I wish there was a good way to make that part of our culture.
Reading "Here Comes Everybody" is what inspired this line of though in me.
Edit: Especially since reading through the rest of the article: what's happening on NextDoor was happening on other sites: email groups and yahoo groups. I think there's bigger hubbub about next door because it's more visible.
It's about being mature and responsible and learning and mitigating bad behavior via feedback loops.
It could say something like "5 of your neighbors thing you are complaining too much, but hey, don't shoot the messenger!".
Signal to noise will always be a problem in online communities because of the one to many nature of them.
Looks like some kind of process for silencing voices is already present in the app....it's just mostly being used to silence voices that point out not all blacks are criminals.
This is only true if a thing _only_ amplifies bad traits.
At the very least, it seems like the present claim implies that bad traits are eclipsing the good ones. The reason I think this matters is because tech evangelism has a worrying tenancy to write problems off as existing prior to the technology, without honestly evaluating whether or not the technology is responsible exacerbating the problem.
I agree that the site is probably not intended to be bad, but that's quite a different claim from yours.