Hi, have a look at:
https://www.openstreetmap.org/#map=14/-20.5170/-43.7082&layers=N
There’s a lot of notes of quite mixed quality all posted in the same day. It’d be nice if somebody could resolve them.
Thanks for the notice, Rico. We’ll do what we can, there’s a lot going on.
Sure. I used to use RSSOwl to track notes in Poland, but now that I have a full time job it’s not really possible to keep up. 
PS: I found this in PostGIS by searching for 4-character precision Geohash boxes with the greatest number anonymous notes created at the same day.