Hazy is fine.
Turbid is not. It doesn't matter if it's yeast or flour, unless it's a wheat beer it's not a good thing.
Don't feel like fining? That's fine too, though in my experience that should still only lead to a hazy beer.
Personally, I've have far too many turbid beers in the region, usually from not letting the yeast settle in the rush to get the beer into production. I honestly feel like this whole flour thing is a not-so-subtle attempt to "cover up" the yeast turbidity. If that's the case, I rate the brewers who do it for those reasons to be more slimy that macrobrewers.
Not trying to step on toes, but enough is enough. If the beers had been clear before this trend I may have felt otherwise.