Bit of a Tagging Conundrum

Should we add color-specific tags in a black and white photo that we know the actual color of?

Background: I'm subscribed to redhead and was just reviewing the latest set of Susan Coffey duplicates to be uploaded when I noticed this in a few of the monochrome photos that were uploaded. We know she has dyed red hair so in a colored photo the tag is relevant(whether or not this is true is subject for another debate). But to an uninformed viewer seeing this by itself, the red hair wouldn't be apparent and so they might think it doesn't belong there.

So to be more specific about my original question:

• Should we apply the color tag to the monochrome picture because the subject is well known to have that color trait? Well known also meaning celebrity status or general public knowledge.
• Should we apply the color tag because the wallpaper was uploaded along with similarly colored ones? Also known as laziness via mass tagging. :P
• Can we apply the color tag to a wallpaper of an obscure subject that only I, the uploader(and maybe a few other people), knows has that color trait, even though I can't/won't upload a similarly colored photo of the subject. Dude, I swear she has red hair. Just trust me, ffs.
• Or should we go by the intended function of tags: to describe and identify a trait found in the specific wallpaper currently being viewed. As found in Rules:

Tags should describe what the image depicts (buildings, sunset) and should not be expressing a view (beautiful, ugly).

It's 2AM so I'm probably over thinking this but I thought it might make for good discussion anyway. Thoughts?

No. If it's a monochrome wallpaper there are no colors in it (at least not more than one, as the word implies). Even if a model has a noteworthy hair color, if that's not apparent in that particular image it's not a property of that image.

Similar case if the hair is not visible at all (head outside the frame, wearing a hat), there would also be no point in tagging the models hair color, even if somebody knows.

On a vaguely related note, there are a lot of other cases where tags should not be added even though you could technically somehow justify it. Especially on some NSFW wallpapers severe overtagging is happening (which is better than no tags but still wrong). Tags are supposed to describe important features of the wallpaper. If somebody searches for a particular tag the wallpaper should only show up if it is of interest to the one who searched for it. Just because there is a blurry three pixel wide bridge somewhere in the background, which you only know because the shooting took place in San Francisco, doesn't mean it deserves the tag bridge. And of course every human has legs, feet and a mouth but that doesn't mean people need to add those on every single wallpaper they upload to the People category. So yeah, little rant on the side. We should probably talk about phrasing the rule a bit more explicitly.

Gandalf said:

On a vaguely related note, there are a lot of other cases where tags should not be added even though you could technically somehow justify it. Especially on some NSFW wallpapers severe overtagging is happening (which is better than no tags but still wrong). Tags are supposed to describe important features of the wallpaper. If somebody searches for a particular tag the wallpaper should only show up if it is of interest to the one who searched for it. Just because there is a blurry three pixel wide bridge somewhere in the background, which you only know because the shooting took place in San Francisco, doesn't mean it deserves the tag bridge. And of course every human has legs, feet and a mouth but that doesn't mean people need to add those on every single wallpaper they upload to the People category. So yeah, little rant on the side. We should probably talk about phrasing the rule a bit more explicitly.

Yeah, I agree. We do have an excessive amount of tags for superficial features in images. My favorite is looking at viewer.

As a little exercise, what would be the correct way to tag this?

1534 x 102457PNG

Note, that it is already tagged with #{Joker} Batman and DC Comics. None of which are apparent features and known only to the uploader and comic fans.

The Tags are:

1. Joker
2. Batman
3. DC Comics
4. Artwork
5. Laughing
6. Simple Background
7. Minimalism

Well it is the Joker and Comic-Fans (ME!) want to look for Batman & Joker Walls so the Tags are absolutely ok.