I recently did a little work (for the first time) on a HOT task 892 in Africa. It was the simple task of adding highways between the settlements. Using Bing imagery we were ask to mark the settlements as landuse=residential and the connections between as highways.
Easy enough you may say and yes it was apart from some poor imagery.
However, paths of about 1 meter width were traced with a higher category even up to highway=unclassified
Tracks of one vehicle width were also traced as highway=unclassified
The highways connecting the settlements were attached to the perimeter of the landuse=residential. Routing would be impossible.
I abided by the HOT instructions and used the landuse=residential but most of the settlements were small homesteads similar to landuse=farmyard. The tag landuse=homestead would have been more appropriate but we don’t have it.
It was also mentioned that locals on the ground would clean up the OSM data after we OSMers left but is that not being a bit unreasonable. These homesteads don’t even have tap water let alone an internet connection.
I shudder to think I would have to use this data for routing!