Nextdoor forums sound like never-ending HOA meetings.
Much like some people suggest that we should choose politicians at random, and that merely wanting to be one should exclude you from being one, the same should be said for HOA Boards. The kind of people who relish that "authority" are the last people who should have it.
there's definitely no way to get a pre-paid visa / giftcard and set an address to it to use as verification for next-door
edit: next door recently asked it's own members to verify their neighbors... because that's always reliable