Today I took a look at the area of Düren and tried to improve the map metadata quality a bit.
In my opinion there were many cases of "abuse" of the name-tag and I hope I'm not the only one seeing it like that because I would hate to screw up good data.
What I found were especially - but not only - meadows, farmland and so on that was (correctly) tagged with the landuse-tag and additionally someone used the name-tag to include basically the same information about the landuse.
To me it looks like the name was often used as a sort of comment. Other examples include the outline of a golf course or forest with names like "not ready yet" and so on. Of course it is nice to include as much useful information as possible in your map metadata, but I doubt that this way will help much as it is not very machine-readable. It should be far better to only use the predefined tags to encode this information. In a few cases I even found roads that were named "unknown" instead of leaving the name away and thus making them much easier to spot. In some cases I renamed the name-tag to a comment-tag to make clear that it is not really a name and to not falsely show it as one on the rendered maps. In other cases I just deleted the name-tag completely as it was redundant information in my opinion and should not appear in maps like that.

I would like to hear other opinions and experiences in these matters. so feel free to comment.