I have noticed a few instances of iD users adding crossing:markings=yes to crossing=marked nodes.
The problem with this is that users are effectively adding a tag to confirm that they didn’t bother to look at the aerial imagery to determine what sort of crossing is present here and just ticked a (low) quality assurance box. Knowing whether a marked crossing is a zebra crossing or one with traffic signals is useful for data consumers, knowing that a marked crossing may be marked somewhat less so.
If iD suggested or only allowed adding values other than “yes” based on actually looking at the available imagery, which was presumably the intent, this might have been quite helpful.
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Ce sujet de discussion accompagne la publication sur https://community.openstreetmap.org/t/id-users-adding-crossing-markings-yes-to-crossing-marked/107451