No need to put minor or irrelevant characters in the appearing lines. So no "and his henchmen" as well as if a character didn't appear majorly then they aren't important so if a character was in an unimportant dream or appeared on a screen you don't need to add an appearance.
A good rule of thumb is that if the character is named and has a line, they might at least appear in the Other Characters section - BUT, without any linking (so, just black text. No "single appearance" tags, etc).
That said, vague things like "gang of thugs" or "crowd outside the mall" are... not good.
I know that runs counter to a bit of what Midoki just said, but I've been meaning to bug him about not tagging ENOUGH people...
Hey Anti-Lad. I'm glad to see somebody hitting the Starman book as its one of my all-time favorite runs. Its been on my list to fully index for a while now but I hadn't taken the time to do it. It'll be nice to have that done since the current Shade mini is using some of those characters like Bobo and Hope O'Dare. If you need any help, let me know.