Based on how some people credit song writers, it wouldn't seem unfair. Personally I would avoid it. The writing credits is already a "group" as it is.

Hmmmm... Companies - named visual effects companies - were valid resources for profound quarreling for a long time...

... initially group dividers were meant to reflect grouping of actors in the cast credits, a vehicle to stay as close to the credits as possible.

From this point of view, I can understand the urge to transfer the headline (for what the group is really credited) into the crew section. ... and I use group dividers to show the song title for song writer credits, too.

But from my point of view, the detailed job description (I'd assume original material in this case) should be sufficient for the writers.

Quoting Elwood Blues:

Quote:
Is that a correct use of the group divider?

No! "Based on the Play By" does not qualify for a group header, just like, say, "Sound Mixed by" does not qualify for a group header, or "Make-up Artist to Robert De Niro" does not qualify for a group header. All that kind of information ony belongs in the "Custom Role" field of the crew section - it should never be put into dividers.

Quoting ankford:

Quote:
I was under the impression dividers were for stuff like episodes or movies on discs with multiple features. Like say you have a disc with 5 episodes of an anthology series, that would divide the different actors into groups

There are two types of dividers: Episode Dividers and Group Dividers:

Use Episode dividers for TV show episodes, distinct films, or other logical episodic distinction. Also use episode dividers for full cast division, such as "Japanese Voices".

Use Group dividers to designate cast grouped in the credits such as "Soldiers" or "Additional Cast".