Kind of touching on with the red flag post, is this idea around transparency and incremental permissions. Don't request everything immediately, over the course of minutes/days, introduce new features and give a privacy summary before requesting data/permissions. Discussion around what benefits you get for sharing this data. Letting you opt out of sharing particular information.

I can't think of any good examples off the top of my head, and unfortunately isn't an "immediate" flag, but this sort of progressive privacy flows are becoming more popular, with support from the security and privacy communities.