These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fair for Its Day: Even though it may not have been the first film to do this, EGAHT not only did a good job of portraying child murder and paedophilia in a time it was controversial (the late fifties, see Boys Beware!), but even managed to make the killer somewhat sympathetic).
Some Anvils Need to Be Dropped: EGAHT has this, naturally, as a film about raising public awareness about the safety of children. The novelisation takes it Up to Eleven by initiating a Bittersweet Ending to explain that in Real Life, there is much less chance of catching the killers than in fiction, and that affected people would have to live with this notion.