Copyright related general tags has been around for a long time, but there isn't any standard on how they should be done. There were a few times where I had to give up fixing a tag, because if I want to change it something needs to be done to similar tags from other copyrights too, which complicate things, tuning a single-copyright thread into a cross-copyright discussion usually leads nowhere. From now on we can use this thread to submit BURs.
First of all, each copyright should have a list of all its general tags, if there is any, some of the bigger copyrights are already doing this. Otherwise it's near impossible to even know they exist. Sometimes I find tags that were created years ago that I had no idea existed, and it's not a surprised that they're often undertagged. It's also impossible to group them together, because:
Qualifier is extremely inconsistent. Whether a tag gets qualified or not doesn't have any logical pattern, and has nothing to do with whether the name is ambiguous or not. There should be some consistency, either they're all qualified or they're all unqualified. I prefer there to be a way to separate real life tags and fictional tags. I tried to qualify them before I realized there're too many unqualified tags. If this doesn't work, at least real life and fictional tags should use separate tag lists.
The weapon tags are 50/50. There're many non-standard qualifiers, like railgun (misaka mikoto) (qualified by character), black barrel (type-moon) (qualified by company, because it's present in multiple copyright), *_(e.g.o) (qualified by another qualified tag), karasawa (weapon) (qualified by weapon).
The school uniforms can't be qualified because they have to end in "school uniform". This has prompted the uniform tags to be unqualified as well. A few exceptions like gem uniform (houseki no kuni) are somehow qualified although the name is especially more ambiguous. As a side note, the list of uniforms also need work. I would prefer it to be sorted by type, not by copyright. Half of the dtext links are broken too, because they have underscores.
The "tag this if three of X are present" group tags also have this issue. It also feels like that many copyrights are solely working on legacy, many only have a few old organizations from the release, but never created new tags for new organizations.
There're many other copyright-related general tags like locations, logos, items, currencies, etc. I'm not going to name them all because I don't know how many there're either. It's difficult to find them. We should start with the easy ones.
