It's easy enough to ask the person that wrote it. Why, do you think answering that is typically difficult or unclear?
And to be clear I mean asking about specific instances, so don't point back at the blog post, which seems to be a case of Amazon making a mistake. All of the hyphens quoted from Moonstruck are grammatically correct.
True, if the process just involves asking the author then I have no issues with that, and it should be easy to resolve.
I do think it is difficult for anyone other than the author to answer that question though. For me, only the "red-head scarf" example would be a mistake, but others in this thread indicated that 3 or 4 of the examples were wrong for them.
