These tags are used prominently for parody if not for a minor occurrence of users tagging straight fan art with it, in contrast with the [decade]_(style) tags which are employed at face value to tag both homage fan art and originally licensed illustrations. As alphes_(style) already implies style_parody should we proceed the same way with the rest?
I can make a few nitpicks about utilizing them exclusively for parody:
- It has caveats at the moment of getting to know the tag: 'author' does not draw in 'author_(style)', fan art of 'author' is not drawn in 'author_(style)'
- An artist may use author's author_(style) without comical intent to draw something original
None of them are critical though, as we already have official_style and I have a hard time picturing the second case.
Updated