I think that's why having one company/group/government trying to filter that correctly for everyone as a bad solution. Different groups will have different standards, and a "one-size-fits-worst" solution seems inevitable.
There is something robust about the way moderation on reddit is handled "by group." This allows for a kind of free market of moderation ideas. The situation on reddit isn't perfect, of course, but such distribution/division might be a step in a better direction for society.