This may be something more suited for an AMA but just putting it out here.
Has Niantic ever considered having portal decay in the game?
There are TONS of waypoints in game that are (quite honestly) ridiculous and obvious no players go there (well except maybe a spoofer)
Why not have a Waypoint get deleted in game if no one interacts with it over an extended period of time? (180 days enough? If noone captures the portal or spins the Pokestop in 6 months really why are we keeping it in game?)